Iron Roof Research Articles

Solar energy harvesting in buildings using a proposed novel electrochemical device as an alternative to PV modules

Abstract In this study, a novel electrochemical device operating based on the thermally regenerative electrochemical cycle (TREC) and including two TREC cells; a hot cell and a cold cell, is proposed to be utilized in buildings to harvest solar energy. The hot cell is heated by solar energy, and should be in direct contact with a hot part of a building such as iron roof and window, while the cold cell should be in direct contact with a heat sink located in a shaded position of the building. The proposed device is first analyzed in detail to provide theoretical concepts. The device has been also constructed and installed in a building, so that, its hot cell is in direct contact with the black iron roof of the building, and its cold cell equipped with a heat sink has been positioned in the shade of the roof. Experimental verifications are given that verify the proposed TREC based device efficiently converts solar heat into electric power ranging up to 54.5 W. To substantiate the novelty and contribution of this research work, the daily power production and all the parameters of the proposed TREC based device which converts solar heat into electric power are compared to those of a commercial PV module KC200GT which converts solar irradiance. The comparison explicitly demonstrates that the economic factor (Cost per kWh) of the TREC based device (317.16 Euro) is slightly more than that of the PV module (315.13 Euro), but instead, it has lower weight and smaller size. Thus, there is technical and economic justification for utilizing the proposed TREC based device.

Assessment of the Occupational Health and Food Safety Risks Associated with the Traditional Slaughter and Consumption of Goats in Gauteng, South Africa.

Background: This study assessed the occupational health and food safety risks associated with the traditional slaughter of goats and the consumption of such meat in Tshwane, South Africa. Methods: A convenience sample of 105 respondents agreed to be interviewed using structured questionnaires. Results: A high proportion (62.64%) of practitioners admitted to not wearing protective clothing during slaughter. Slaughtering was mainly carried out by males (99%) with experience (62.2%). Forty-four percent of practitioners only changed the clothes they wore while slaughtering when they got home. During the actual slaughter, up to seven people may be involved. The majority (58.9%) of slaughters occurred early in the morning and none of the goats were stunned first. In 77.5% of cases, the health status of the persons who performed the slaughtering was not known. The majority (57.3%) of the slaughters were performed on a corrugated iron roof sheet (zinc plate). In 83.3% of the cases, the carcass was hung up to facilitate bleeding, flaying, and evisceration. Meat inspection was not practiced by any of the respondents. Throughout the slaughter process, the majority used the same knife (84.3) and 84.7% only cleaned the knife when it became soiled. A total of 52.0% of the respondents processed the carcass and cooked the meat immediately. The majority (80.0%) consumed the meat within 30 min of cooking. Conclusions: Men are at a higher risk of occupational health hazards associated with traditional slaughter, which can be transferred to their households. Unhygienic methods of processing and the lack of any form of post-mortem examination increase the risk of food-borne illness following the consumption of such meat.

Spectrophotometric Method for the Determination of Atmospheric Cr Pollution as a Factor to Accelerated Corrosion.

The effect of Cr(VI) pollution on the corrosion rate of corrugated iron roof samples collected from tanning industry areas was investigated through simulated laboratory exposure and spectrophotometric detection of Cr(III) deposit as a product of the reaction. The total level of Cr detected in the samples ranged from 113.892 ± 0.17 ppm to 53.05 ± 0.243 ppm and showed increasing trend as sampling sites get closer to the tannery and in the direction of tannery effluent stream. The laboratory exposure of a newly manufactured material to a simulated condition showed a relatively faster corrosion rate in the presence of Cr(VI) with concomitant deposition of Cr(III) under pH control. A significant (P = 0.05) increase in the corrosion rate was also recorded when exposing scratched or stress cracked samples. A coupled redox process where Cr(VI) is reduced to a stable, immobile, and insoluble Cr(III) accompanying corrosion of the iron is proposed as a possible mechanism leading to the elevated deposition of the latter on the materials. In conclusion, the increased deposits of Cr detected in the corrugated iron roof samples collected from tanning industry zones suggested possible atmospheric Cr pollution as a factor to the accelerated corrosion of the materials.

Atmospheric Corrosion of Corrugated Iron Roofing Sheet in Oil Producing Locations in Southeastern Nigeria

The study evaluated the atmospheric corrosion of corrugated iron roofing sheets in rural, urban, and marine environments using rain water harvested from roofs of various ages. Corrosion study was based on the weathering processes leading to high levels of sulphate, chloride and nitrate in rainwater in the three areas. Results showed that roofs below one year and 2 years in age were more susceptible to rusting than roofs above 15 years. The mean corrosion rates were higher in marine (Ibeno) ranging between 0.16 × 103 μm/yr and 2.94 × 103 μm/yr followed by rural (Okobo) 0.08 × 103 - 1.88 × 103 μm/yr, and the least was urban (Uyo) 0.031 × 103 μm/yr - 0.79 × 103 μm/yr. Sulphates, nitrates and chlorides were high in the marine environment, which also coincided with the area of gas flare by Mobil Oil exploration activities. Increase in temperature and acid rain formations in this area led to increased acid rainstorm. This could manifest in the erosion of beach and wetland, inundates low-lying areas (Ibeno, Ibaka (James town), Oron, Utan brama, Utan-Effiong and Mbe-Ndoro) flooding and loss of coastal land and mangrove forests. Above all, gas flaring affects atmospheric water quality in which soil, crops, fruits, streams, and rivers are affected.

Design and management of rainwater harvesting systems to control water quality for potable purposes in Cu Khe, Vietnam

There are debates about whether rainwater is suitable as drinking water. A serious shortcoming of the debate is that there are differences in the design and management of rainwater harvesting (RWH) systems. This study is based on the performance of two RWH systems that are used for drinking purposes at a kindergarten and a primary school in Cu Khe, Vietnam. Each system comprised a painted galvanized iron roof, a first-flush diverter, two stainless steel tanks connected in series, a calmed inlet, mosquito screens on open holes, PVC pipelines, filter cartridges, and a UV sterilizer. During 18 months, stored rainwater was sampled five times, and treated rainwater was sampled four times. Twenty-three water quality parameters were analyzed, including pH, total dissolved solids, turbidity, nitrate, nitrite, ammonia, hardness, arsenic, iron, cadmium, nickel, chromium, manganese, mercury, selenium, lead, zinc, Escherichia coli , and total coliform. It was found that all the physicochemical qualities of the stored rainwater, prior to treatment, satisfied the World Health Organization (WHO) drinking water guidelines. After physical filtration and UV sterilization, all parameters, including microbiological indicators, satisfied the WHO drinking water guidelines. Further management strategies to stabilize water quality were discussed.

Structural contribution of glass in Saint-Hubertus Galleries

Many of the glass-covered iron and steel frames from the nineteenth and twentieth centuries now require renovation. During rehabilitation, the question arises of how to preserve built heritage while fulfilling modern standards on safety and structural integrity. In a traditional recalculation, the glass panels are considered to be dead load on the iron frame, leading to the conclusion that the original frame requires strengthening. This paper presents a calculation that takes the contribution of the glass plates into account while assessing historical glass coverings. The overall structural behaviour of the iron and glass roof of the Saint-Hubertus Galleries, Belgium, was simulated and a parameter study was performed using a finite-element software package. The original structure comprises a wrought-iron frame clad with single glass panes connected to the glazing bars with traditional linseed-oil putty. The behaviour of the original structure, the influence of the application of modern adhesives and sealants, and the replacement of single with laminated glass plates is investigated. Although building such models is time consuming, including glass panes in the model leads to lower stresses, deflections and a better buckling behaviour, even if connected with linseed-oil putty.

Students' Perceived Heat-Health Symptoms Increased with Warmer Classroom Temperatures.

Temperatures in Africa are expected to increase by the end of the century. Heat-related health impacts and perceived health symptoms are potentially a problem, especially in public schools with limited resources. Students (n = 252) aged ~14–18 years from eight high schools completed an hourly heat-health symptom log over 5 days. Data loggers measured indoor classroom temperatures. A high proportion of students felt tired (97.2%), had low concentration (96.8%) and felt sleepy (94.1%) during at least one hour on any day. There were statistically significant correlations, when controlling for school cluster effect and time of day, between indoor temperatures ≥32 °C and students who felt tired and found it hard to breathe. Consistently higher indoor classroom temperatures were observed in classrooms constructed of prefabricated asbestos sheeting with corrugated iron roof and converted shipping container compared to brick classrooms. Longitudinal studies in multiple seasons and different classroom building types are needed.

Water for small‐scale biogas digesters in sub‐Saharan Africa

AbstractBiogas could provide a more sustainable energy source than wood fuels for rural households in sub‐Saharan African. However, functioning of biogas digesters can be limited in areas of low water availability. The water required is approximately 50 dm3 day−1 for each cow and 10 dm3 day−1 for each pig providing manure to the digester, or 25 (±6) dm3 day−1 for each person in the household, using a digester volume of 1.3 (±0.3) m3 capita−1. Here, we consider the potential of domestic water recycling, rainwater harvesting, and aquaculture to supply the water needed for digestion in different countries of sub‐Saharan Africa. Domestic water recycling was found to be important in every country but was usually insufficient to meet the requirements of the digester, with households in 72% of countries need to collect additional water. Rooftop rainwater harvesting also has an important role, iron roofs being more effective than thatched roofs at collecting water. However, even with an iron roof, the size of roof commonly found in sub‐Saharan Africa (15 to 40 m2) is too small to collect sufficient water, requiring an extra area (in m2) for each person of (R/100) (where R is the rainfall in mm). If there is a local market for fish, stocking a pond with tilapia, fed on plankton growing on bioslurry from the digester, could provide an important source of additional income and hold the water required by the digester. In areas where rainfall is low and seasonal, the fishpond might be stocked only in the rainy season, allowing the pond to be covered during the dry period to reduce evaporation. If evaporative losses (E in mm) exceed rainfall, an extra catchment area is needed to maintain the water level in the pond, equivalent to approximately (1.5 × ((E−R)/R)) m2 for each person in the household.

A comparative analysis of a white-roof installation during a New Zealand autumn and winter

AbstractIt has been asserted that a white roof reflects the sun’s rays back into space, reducing the heat absorbed into the structure beneath it and therefore reducing the cooling requirements of the occupied space. This paper presents comparative field data on structurally identical buildings with an installation of a painted white (Titania) iron roof compared to the neighbouring existing control (red) iron roof for autumn and winter. It is shown that there were significant variances in roof surface and roof cavity temperatures between the building with the white roof and the building with the red roof, and that the occupied rooms in the two near-identical buildings showed very similar temperatures during the cooler parts of the day. It is suggested that the roof colour of a ceiling-insulated structure has very little impact on the temperature of the occupied and insulated space, but that during the hotter parts of the day there can be up to a 10°C temperature differential in the roof. From this prelimin...

Malaria prevalence and incidence in an isolated, meso-endemic area of Mozambique.

Isolated areas, such as the 2 × 7 km peninsula of Linga Linga in Mozambique, are the places where malaria might be most easily eliminated. Currently available control strategies include long-lasting insecticidal bednets impregnated with pyrethroid insecticides (LLINs), rapid diagnostic tests (RDTs) for diagnosis and artemisinin based combination therapy (ACT) for treatment and these were applied on the peninsula. In 2007, following a census of the population and mapping of 500 households, five annual all-age prevalence surveys were conducted. Information on LLIN use, house construction, and animal ownership was obtained. A spatially structured generalized additive model indicated that malaria risk was greatest towards the northern end of the peninsula and that people living in houses with grass or thatch roofs had a greater risk of malaria than those living in houses with corrugated iron roofs. Incidence peaked nine weeks after rainfall (r2 = 0.34, p = 0.0002). From 2009 incidence was measured at a centrally based project clinic. The proportion of under nine-year-old resident attendees diagnosed with malaria decreased significantly from 48% in 2009, to 35% in 2010 and 25% in 2011. At the same time, there was a shift in the peak age of cases from 1–4 year olds to 5–9 year olds. Nevertheless, in order to further reduce malaria transmission in an area such as Linga Linga, additional vector control measures need to be considered.

Thermal comfort characteristics of some selected building materials in the regional setting of Ile-Ife, Nigeria

In Ile-Ife, it is very common to see quite a lot of local people engaging in mud bricks moulding, concrete block making, mud house construction and the bricklaying profession in general. These have particular bearing on the economy and the political situation of the people involved as in the profession there is set of rules and regulations guiding the rate and procedure for carrying out any such moulding or construction work. Considering the importance of this, the present study investigated the thermal performance of some selected building materials in the ancient city of Ile-Ife in Nigeria. The work demonstrated how a building envelope responds to outdoor conditions through graphic illustrations. This was followed by constructing three physical building models, with model 1 constructed of mud bricks, model 2 constructed of concrete blocks and model 3 constructed of cast concrete. Each of the models was first roofed with galvanised Iron roofing sheets, later with aluminium roofing sheets and finally with asbestos roofing. Readings were taken by inserting TGP-4500 Data loggers into appropriate positions. The results showed that internal temperatures in the mud-brick and cast concrete buildings remained fairly stable despite external diurnal fluctuations. Humidity data collected also showed that fluctuations in external humidity levels do not affect humidity levels within the mud-brick and cast concrete structures significantly. On the other hand, the structure made of concrete blocks responded more to external fluctuations in temperature and humidity. Moreover, humidity levels in the cast concrete building were the least, followed by those in the mud-brick house; while the concrete block structure had the highest level of humidity. It was also discovered that aluminium roofing gave the highest internal temperature, followed by galvanised iron roofing and the least was seen with asbestos roofing. For external diurnal fluctuations, building model 3 with cast concrete gave the most satisfactory performance in terms of thermal comfort; however, building model 1 with mud bricks also gave a satisfactory performance close to that of model 3. The study concludes that building model 1 with mud bricks roofed with Asbestos is the best building model in terms of thermal comfort and affordability. The study also concluded that developing model 1 (mud bricks) in the regional setting of Ile-Ife will go a long way to developing people’s sustainably.

The restoration of Tynemouth Railway Station canopy

Tynemouth railway station was built in 1882 and characterises the zenith of the railway age in Britain. The elegant cast and wrought iron roof is a Grade II* listed structure, an important regional example of its type. It fell into disrepair in the 1960s through lack of maintenance and by 2008 the larger part of the eastern canopy was in an appalling state with widespread corrosion. This paper describes the restoration. Basic calculations of capacity were undertaken prior to survey, to inform observations and the measurements of residual thickness. A comprehensive survey of defects was carried out and a document outlining the conservation philosophy was compiled, which formed the basis of the listed building consent. Almost all iron columns were found to have cracked near the top of the casting. Replacement of columns was considered to be too great a loss of historic fabric and unnecessary; the reasons for this are discussed. The paper concludes with an appraisal of the project's successes.

Effect of age and rainfall pH on contaminant yields from metal roofs.

Metal roofs are recognized for conveying significant metal loads to urban streams through stormwater runoff. Metal concentrations in urban runoff depend on roof types and prevailing weather conditions but the combined effects of roof age and rainfall pH on metal mobilization are not well understood. To investigate these effects on roof runoff, water quality was analysed from galvanized iron and copper roofs following rainfall events and also from simulating runoff using a rainfall simulator on specially constructed roof modules. Zinc and copper yields under different pH regimes were investigated for two roof materials and two different ages. Metal mobilization from older roofs was greater than new roofs with 55-year-old galvanized roof surfaces yielding more Zn, on average increasing by 45% and 30% under a rainfall pH of 4 and 8, respectively. Predominantly dissolved (85-95%) Zn and Cu concentrations in runoff exponentially increased as the rainfall pH decreased. Results also confirmed that copper guttering and downpipes associated with galvanized steel roof systems can substantially increase copper levels in roof runoff. Understanding the dynamics of roof surfaces as a function of weathering and rainfall pH regimes can help developers with making better choices about roof types and materials for stormwater improvement.

Dreams Are Not Made of Concrete

Dreams Are Not Made of Concrete Joshua Craze (bio) 1. The sun is slowly coming up on one of the main thoroughfares in Juba. Most of the streets do not yet have names; the city is too young, and we navigate using landmarks. At night, I am lost in the endlessness of the dusty tracks, the absence of electric lighting, the silence of the stars, and the uncertain edges of urban settlements. The night is receding, and the sun is throwing the market stalls of Konyo-Konyo into flat relief. It is an auburn light, still so faint that it seems as if objects (a corrugated iron roof, a blue UNHCR tarpaulin, dried fish) are clinging to it, holding its chaste offerings to themselves like gifts of flowers. There are only a few cars on the street, and the dirt has not yet absorbed the sky in its swirling dominion. I sit next to a roadside stall (a cardboard box with a cloth on top, charcoal in a brazier, a heavy pot on the fire) drinking the burning-hot sugar syrup that passes for tea here. The road lies ahead of me, unmoving. Soon, cars will be careening over potholes, cutting cartographies through the dusty furrows of the road as they make their way into town. In 2005, the Sudan People’s Liberation Movement/Army (SPLM/A) signed a peace treaty with the northern government, ending 22 years of civil war. In 2011, just two months before I wrote these words, Southern Sudan voted to decide on whether it wants to secede from the North. Juba is soon to become Africa’s newest capital. Throughout the conflict, the city was in a state of suspended animation: the government controlled the urban center, but the SPLM, seasoned guerrillas, had encircled it. Supplies came at a premium. [End Page 35] Residents who remember that time speak darkly of searching for food in the rubbish. The core of the city dates from this period: a series of stone houses, owned by northern merchants fearing for their future, that today form an embattled stockade in the midst of a rapidly growing urban sprawl. Since 2005, a new type of urbanism has sprung up. Tent cities shelter along the banks of the Nile. Then there are the concrete bungalows built by soldiers and politicians, and the endless squatter camps that are going up overnight, as thousands of internally displaced people return south after years of exile. It is not just those displaced by war that have flooded into Juba. There are East Africans looking for work, journalists looking for fame, and endless aid workers, whose extravagant salaries have turned Juba into an unlikely boomtown. Their uncertain coexistence makes for an uneasy peace. We all live next to each other, in this city that is not quite urban, not quite a city, and not yet a capital. We wait for the results of the referendum. 2. In Sans Soleil, Chris Marker’s elegiac investigation into the nature of memory, the narrator tells us that she received a letter from Krasner: He told me that in the 19th century, mankind had come to terms with space, and that the great question of the 20th was the coexistence of different concepts of time. There is some truth to this, I think, drinking my third tea of the day as the sun climbs higher in the sky, and the market stalls, ad hoc constructions of tarpaulin and corrugated iron, start to shine. I wave at a lumbering UN Land Cruiser careening over reluctant potholes. The driver, Haider, is a Pakistani soldier spending a year with the United Nations Mission in Sudan (UNMIS). I met him a few nights ago, at the sprawling UN compound next to the airport, and we bonded by dreaming of Sajji, that wonderful dish of roast lamb stuffed with rice, beloved in Balochistan. Lamb of any kind felt very far away that night, surrounded by UN pizza joints, and something like a shared bodily memory (grease, rare meat that gives easily in the mouth, the smell of charcoal) brought us together. [End Page 36] The UN compound is a world of its own, replete with...

Rainfall Harvesting as an Alternative Water Supply in Water Stressed Communities in Aguata-Awka Area of Southeastern Nigeria

Alternative sources of water are sought in some water stressed communities in the study area. The study focuses on the Aguata-Awka area of southeastern Nigeria. Aquifers occur at great depths, and surface waters may be far from homesteads. The scarcity of water has necessitated the people to adopt various local technologies for harvesting rainfall. The local technology includes collecting rainwater from roofs and channeling the water into large underground tanks, shallow wells and surface reservoirs. Large concrete tanks of 6 m × 6 m × 4 m dimensions are often built underground and can store 144 m3 of water. Surface reservoirs built on 4 m concrete pillar supports having dimensions of 10 m × 10 m × 4 m and have a storage capacity of 400 m 3 . Water samples were collected at 3 different locations of Agulu, Ekwulobia, and Awka and were analyzed for their physical, chemical, and bacteriological parameters. Results indicate a range of values for pH, 5.9 to 7.1; turbidity, 0.9 to 2.7; total dissolved solids, 80 to 170 mg/L; total hardness, 4.5 to 6.4 mg/L; magnesium, 1.2 to 1.4 mg/L; bicarbonate, 19.4 to 83.6 mg/L; and sulfate, 3.6 to 6.4 mg/L. Bacteriological analysis results were negative for fecal and total coliform counts. All parameters, with the exception of pH where aluminum and galvanized iron roofs are used for collection, fall within the recommended guidelines for drinking water quality of the World Health Organization, and the Standard Organization of Nigeria, new Nigerian standards for drinking water quality. Magnesium is above the maximum permitted level for consumer acceptability of the Nigerian standards for drinking water quality. The water can be classified as fresh moderately hard and soft. The water can be described as a calcium and bicarbonate type.

Affordability and willingness to install a rooftop rainwater harvesting system: the case of rural households in the Lowveld region of Swaziland

This paper assesses affordability and willingness of rural households in the Lowveld region (drought prone and experiencing water scarcity) of Swaziland to install rooftop rainwater harvesting systems consisting of gutters and storage tanks. Through purposive sampling, 350 heads of households were selected in homesteads which have corrugated iron or tile roofs, and then in-depth face to face interviews conducted. The findings indicate that 93.4% of the households were willing to install rainwater harvesting systems but their economic situation, characterised by low incomes and the high cost of the rainwater harvesting system, inhibited most from doing so. In conclusion the relative low adoption rate of roof rainwater harvesting systems in Swaziland is attributable to affordability challenges and not lack of willingness to install rooftop rainwater harvesting systems. The study recommends that household low interest loans and attractive subsidies should be provided in order to promote the adoption of rainwater harvesting technology.

Comparative Analysis of Water Samples from Three Different Sources (A Case Study of Bosso, Minna Niger State)

This study assesses the level of potability of water samples harvested from different sources roof in Bosso LGA in Niger state, Nigeria. To achieve this goal a physiochemical analysis was carried out on three water samples collected from galvanized iron roofing sheets, a well and a borehole. The harvested water samples were analyzed for major physical and chemical quality parameters as recommended by World Health Organization (WHO) and Nigerian Standard for Drinking Water Quality (NSDWQ) and results compared. The results showed for pH (7.2, 6.6 and 7.5), alkalinity (48.7, 52, and 81.1), electrical conductivity (176, 104, and 230), total dissolved solids (88, 52, and 115), total hardness (55, 39, and 93), colour (4.0, 8.4, and 3.3), Temperature (23.2, 23.2, and 23.2), Zn (6, 4 and -), sulphate (0.9, 29, and 26), turbidity (2.1, 6.7 and 1.8), iron (0.14, 0.21, and 0.03) and TSS (0, 2.8 and 0) for galvanized iron roof sheet, well and borehole respectively. Some of the results observed met the recommended standards for drinking. Thus, rainwater from these rural settlements can be harvested and stored domestic purpose. Similarly, significant differences exist amongst the water samples collected from the three sources. Thus, rainwater from these sources should be purified before consumption.

Comparison of roof runoff water originated from two types of roof material

The present study demonstrates the differences in the quality of roof runoff from bitumen shingle and galvanized iron test roofs. Average first flush conductivity was found to be 113.6 μS/cm in bitumen roof runoff as opposed to 45.4 μS/cm in galvanized iron roof runoff. The chemical oxygen demand of bitumen roof runoff was one order of magnitude higher than that of galvanized iron roof runoff, which could be attributed to the material and coarse surface of the former roof. The suspended solid content of the two runoffs there were, in average, identical.

SSUIS – a research model for predicting suspended solids loads in stormwater runoff from urban impervious surfaces

Suspended solids from urban impervious surfaces (SSUIS) is a spreadsheet-based model that predicts the mass loading of suspended solids (SS) in stormwater runoff generated from impervious urban surfaces. The model is intended to be a research tool and incorporates several particle accumulation and washoff processes. Development of SSUIS is based on interpretation of storm event data obtained from a galvanised iron roof, a concrete car park and a bitumen road located in Toowoomba, Australia. SSUIS is a source area model that tracks the particle mass balance on the impervious surface and within its lateral drain to a point of discharge. Particles are separated into two groups: free and detained, depending on the rainfall energy required for surface washoff. Calibration and verification of SSUIS against the Toowoomba SS data yielded R(2) values ranging from 0.60 to 0.98. Parameter sensitivity analysis and an example of how SSUIS can be applied to predict the treatment efficiency of a grass swale are also provided.

The role of sulphur dioxide and gas flare particulates on the corrosion of galvanized iron roof sheets in south-south region of Nigeria

The failure of galvanized iron roofs is one of the problems suspected to be associated with environmental pollution in the south- south region of Nigeria often called Niger Delta. In this study, two parameters, sulphur dioxide and particulate matters linked to gas flaring were examined in an outdoor exposure test to determine their relative contributions to the corrosion impact. The experiment involved the exposure of specimen of galvanized iron sheets to the atmosphere for twelve months while readings of the two parameters were taken periodically. The mass loss of each of the specimens was determined at the end of the experiment. The obtained data were subjected to statistical treatment and the examination of the output of the descriptive statistics, multiple regression and Pearson product moment correlation analyses reveal that sulphur dioxide (SO2) did not significantly contribute to the problem while aerosol did. When the pollutants were regressed separately, their results showed that sulphur dioxide had an R2 value of 0.389 and significant F change of 0.030 (p<0.05), and aerosol, an R2 value of 0.660 and significant F change of 0.001 (p<0.05); however, in combination, the two parameters were shown to be more significant in a combined regression analysis (R2 = 0.70) (p<0.05). Thus, their combined influence in the promotion of corrosion is higher than their separate impacts suggesting synergism. The study confirmed that gas flaring contributed significantly to the corrosion of galvanized iron roofs in the region. Key words: Atmospheric corrosion, gas flaring, sulphur dioxide, particulate matter.