Cathodic protection of type 310S stainless steel in a chloride–bromide mixed molten salt at 923 K. (15th August 2019)

• Record Type: Journal Article
• Authors: TranVan, Nam; Sah, Santosh Prasad; Tada, Eiji; Nishikata, Atsushi
• Is Part Of: Corrosion science. Volume 157(2019)
• Page Start: 62
• Page End: 69
• Publication Date: 2019-08-15
• Subjects: A. Molten salt -- A. Stainless steel -- B. Potentiostatic -- B. SEM-EDS -- C. Corrosion -- C. Cathodic protection; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2019.05.002
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: Corrosion of type 310S under cathodic polarization in chloride/bromide melt is studied. Cathodic protection is effective to decrease the corrosion rate of type 310S. The thickness of chromium depletion layer decreased by lowering the protection potential. Abstract: Corrosion behaviour of type 310S stainless steel (310S) was investigated under cathodic polarisation in a chloride–bromide melt at 923 K to confirm the feasibility of cathodic protection. Potentiostatic cathodic polarisation was carried out at different potentials for 48–144 h. Mass loss after 48 h of corrosion was 1.32 mg·cm −2 without cathodic protection. This mass loss can be reduced by one order of magnitude on cathodic polarisation of 0.86 V. On this extent of cathodic polarisation, Cr-dissolution was largely suppressed. For carbon steel, a similar reduction in mass loss was observed just by 0.35 V of cathodic polarisation.