SCC

Different allows show different behavior in dry HCl gas. Maximum corrosion limits of 0.075 and 0.50 mm/yare decided as design factors for specific components and these are conservative limits. For instance, during studies of 650 hours, mild corrosion rate of 0.25 mm/y at 590oC is noticed. In applications above the dew point, the presence of … Continue reading Corrosion resistance of Nickel and its alloys in hydrogen chloride applications

While Monel 400 offers superior resistance to SCC in aerated acid, it is not adequate to prevent damage. Monel K500 and 400 grades are exposed to corrosive conditions in vapor phase of hydrofluoric acid in the presence of oxygen. Studies emphasize the need to eliminate air in the vapor phase above the acid. As HF … Continue reading Which alloy should be used in oil refinery processes for better performance

Corrosion in chemical processing media often reduces with increase in their pH level. In alkaline solutions, hydrogen ions are usually present in nominal magnitudes. Although, various metals can withstand some pH, often basic in nature but experience severe corrosion with increase in pH level. Usually alkali corrosion is led by pitting and other types of … Continue reading Which high nickel alloy provides the best performance in alkali media

Usually it is understood that pure metals are more resistant to environmental assisted cracking as compare to alloyed metals because pure metals have lower mechanical strength and high ductility. For instance, it is said that commercially pure nickel is not prone to stress corrosion cracking, until unless it is heavily cold processed at high temperatures … Continue reading Observation of Stress corrosion behaviour of Nickel based alloys