Abstract
<p><em>The corrosion behavior of mild carbon steel, has been investigated using an immersion test and energy-dispersive X-ray spectroscopy in solutions from the sites of Karangsong and Eretan, Northern Coast of West Java Region, Indonesia. As reference, solutions of 3.5% and 5% NaCl were prepared. Salinity, conductivity, and total dissolved solids (TDS) were measured. It was found that uniform corrosion observed on mild steel during the immersion test. Corrosion resistance of alloys decreases with increasing exposure time in natural seawater solutions. Since magnitudes of conductivity, salinity and TDS of all test solutions are similar, it implied that chloride ion have primary role for inducing the corrosion risk of mild steel. That parameter hinders the formation of stable passive film on the surface of corroded mild steel.</em></p><p><strong>Key words:</strong> <em>conductivity; immersion test; mild steel; salinity; seawater; total dissolved solids</em>.</p>
Highlights
Mild steel has become one of the mostly used materials in the field of engineering all over the world
Seawater is a complex chemical system which affected by various parameters, including concentration and access of dissolved oxygen (DO), salinity, concentration of minor ions, biological activity, and pollutants ( ASM, 1987)
Figure. 2 shows the alteration in corrosion rate of the carbon steel obtained from immersion using seawater from Karangsong and Eretan sites, respectively
Summary
Mild steel has become one of the mostly used materials in the field of engineering all over the world. Our preceding research had investigated the relationship between the corrosion behavior of steel and those environmental parameters in Bali, Madura and Jakarta Regions, Indonesia (Sundjono et al, 2017) They found the differences on dissolve oxygen and salinity causes the different corrosion behavior of mild steel in the coastal area (Sundjono et al, 2017). The pickled specimens were cleaned and washed using distilled water acetone, and stored in vacuum desiccators They were weighed for the initial weight. The specimen was washed with distilled water, dried and weighed in order to get the final weight Carbon steel such as UNS G10400 that applied as immersed offshore infrastructures are attacked by uniform corrosion (Ismail & Adan, 2014). The observation for constituent distribution on the surface of corroded specimens was conducted by using energydispersive X-ray spectroscopy
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