Corrosion behavior of 19Cr-18Mn-0.69N austenitic stainless steel was studied by cyclic polarization technique in 3.5 % NaCl solution and was compared with that of other austenitic stainless steels having different compositions namely, AISI 316L and one with 14 Cr and  8% Mn, denoted 14Cr-8Mn in the following. The results showed that 19Cr-18Mn-0.69N austenitic stainless steel exhibits higher pitting resistance compared to that of other two alloys. SEM micrographs of 19Cr-18Mn-0.69N austenitic stainless steel after corrosion showed no pits at the alloy surface even when it was polarized beyond transpassive pitting potential. However severe attack was seen at the araldite-metal interface. But, in case of AISI 316L and 14Cr-8-Mn severe pitting attack was seen at the surface, whereas no attack was seen at araldite-metal interface. Critical crevice temperature for the three stainless steels was determined. 19Cr-18Mn-0.69N austenitic stainless steel was found to have good crevice corrosion resistance compared to other alloys investigated.

Please login / register to post comments

news in steel

High yield strength and close tolerances

Spanish welded steel tube specialist Bornay S.L. has ordered an HF (High Frequency) tube welding line, type RD 40, from SMS group for its Alicante works. SMS group is the single-source supplier of all technical equipment from strip preparation to the cut-off-saw.

SSAB and Kemppi create a joint digi solution to speed up the welding process

SSAB and welding solutions company Kemppi have successfully piloted sending material certificates automatically from SSAB’s SmartSteel cloud to welding equipment.

Tibnor to acquire Sanistål’s steel distribution business

SSAB’s subsidiary Tibnor has agreed to acquire the steel distribution business of the Danish company Sanistål A/S, Denmark’s second largest steel distributor. This supports SSAB’s strategic target to strengthen its Nordic home market position.

POSCO Pohang modernizes its wire rod and bar-in-coil mill #2

Pohang Iron and Steel Company (POSCO), the fifth largest steel producer in the world and largest in Korea, has awarded SMS group the order to modernize its existing wire rod mill at its Pohang works.