Abstract
In this study, corrosion behaviors of materials used in diffusion units and equipment used in juice clarification steps and tubes in evaporators at Ankara Sugar Factory were investigated in terms of juice production and juice clarification processes as well as juice medium at evaporation stages. The measurements have been performed by comparing steel types used in these units and alternative types of steels that can also be used during the study. For this purpose, pH and Brix (Bx, refractometric dry matter) values of raw juice, thin juice and juice taken from evaporator have been measured during 2009–2010, 2010–2011, and 2011–2012 campaign periods of Ankara Sugar Factory. In addition to these measurements, traditional weight loss and electrochemical tests such as Linear Polarization Resistance (LP), Tafel Extrapolation (TP), Electrochemical Impedance Spectroscopy (EIS) were performed to measure and compare the corrosion rate of the metals used in different juice mediums. The metals included in the study were AISI 316L, AISI 304L grade stainless steel, St 37.2 grade carbon steel and nickel-coated St 37.2. The highest and the lowest corrosion rates were recorded for raw juice and thin juice, respectively. St 37.2 steel had the fastest corrosion rate, whereas the stainless steel AISI 316L has the slowest corrosion rate. However, AISI 316L shows only slightly higher corrosion resistance compared to the corrosion resistance of AISI 304L in different juices. Therefore, AISI 304L steel, which is cheaper than AISI 316L, can be selected as a substation of St 37.2 steel.
Highlights
Along with the development of sugar industry, corrosion has drawn attention in sugar industry and in terms of corrosion, various stages of corrosion are analyzed with regards to material and environment by many researchers
The highest and the lowest corrosion rates were recorded for raw juice and thin juice, respectively
Corrosion behavior of St 37.2, nickel-coated St 37.2, AISI 304L and AISI 316L stainless steel in different types of juices produced in Ankara Sugar Factory was studied during 2009–2010, 2010–2011, and 2011–2012 campaign periods
Summary
Along with the development of sugar industry, corrosion has drawn attention in sugar industry and in terms of corrosion, various stages of corrosion are analyzed with regards to material and environment by many researchers. In Ankara Sugar Factory, most of the equipment parts are made of St 37.2 type steel because of its low cost, good mechanical properties and ease of fabrication. The use of stainless steel such as AISI 304L and AISI 316L that have better corrosion resistance for various processing industries as a construction material in sugar factory can minimize these operating costs. For this reason, most sugar mills around the world have switched over the components made of various grades of stainless steel [4].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
