The effect of CeCl₃ inhibitor on the localized corrosion of stainless steel in chloride solutions

Abstract

Stainless steels have been used extensively in many sectors such as medical and household appliances as well as construction. This has been primarily due to their high resistance to corrosion attacks, reasonable cost, and excellent mechanical properties. However, when placed in corrosive media stainless steel is susceptible to localized corrosion attacks, especially when placed in chloride solutions. The paper explores the issue of corrosion liability of austenitic (AISI 316) and duplex (UNS S32205) stainless steels in et aconditions of seawater environment as well as under the influence of an inhibitor in the same environmental conditions. The behavior of stainless steels was examined via electrochemical testing relying on DC and AC techniques, optical metallographic analysis, scanning electron microscopy, and X-ray diffraction analysis.Duplex stainless steel showed better resistance to localized corrosion but a higher tendency toward general corrosion in all examined solutions. Cerium chloride in a chloride solution showed inhibiting properties for both the AISI 316 and the UNS S32205. K E Y W O R D Scerium chloride, corrosion, SEM, stainless steels, X-ray diffraction

Microstructural and Electrochemical Study: Pitting Corrosion Mechanism on A390 Al–Si Alloy and Ce–Mo Treatment as a Better Corrosion Protection

“…Recently, several environmental and health legislations have limited the use of chromium compounds due to their high toxicity and carcinogenic nature [42,[47][48][49][50], which leads to the urgent search for new and better alternative methods [51][52][53][54][55][56][57][58][59]. For this reason, sulfuric acid anodizing treatment followed by a cerium-molybdenum surface modification process was investigated through this research, to increase the corrosion protection and durability in anodized A390 Al-Si alloy produced under spray-deposited technology.…”

Influence of inhibitors on the corrosion behavior of the X5CrNi18 10 stainless steel‐welded joint

“…Petek and Kovačič [ 29 ] have demonstrated that cerium sulfate has a significant inhibitory effect on AISI 420 stainless steel in acidic sulfate solutions. Alar et al [ 30 ] found that cerium chloride in chloride solutions has a good inhibitory effect on austenitic stainless steel (AISI 316) and duplex stainless steel (UNS S32205).…”