Preliminary Investigations on the Corrosivity of PUSPATI'S Tap Water Toward Different Types of Steel

摘要

The corrosivity of tap water toward three types of steel has been investigated. It was found that galvanised steels and stainless steels do not experience any significant weight loss after being immersed in tap water for 15 to 30 days. Mild steel, on the other hand, was found to lose 0.34% of its weight after an immersion of 15 days and 0.46% of its weight after 30 days immersion. Water analysis indicates that during the immersion, significant amounts of Fe/sup 3+/ ions were transferred from the metal surface into the solution. Results of the hardness measurement also suggest that CaCo3 scales which are loosely adhered to the surface of the metal have been formed. However, such layers are of no protective value and were removed during the cleaning of the specimen. (Atomindex citation 18:012854)