Aging of Type 316L Stainless Steel in Seawater: Relationship Between Open-Circuit Potential, Exposure Time, and Pitting Potential

Abstract The corrosion behaviour of type 316L stainless steel in aqueous 30–50 wt%. NaOH at temperatures up to 90 °C has been elucidated. Exposure to room temperature environment showed parabolic weight loss behaviour, with corrosion rates of up to 0.4 mm/year. Higher NaOH concentrations and exposure temperatures resulted in a reduced stability of the electrochemical passivity domain, associated with higher corrosion rates. Exposure to de-aerated 50 wt%. NaOH presented corrosion rates of up to 0.5 mm/year at open circuit potential, with maximum corrosion rates under polarisation of up to ≈ 18 mm/year. The formation of a dark iron-oxy-hydroxide and nickel-oxide was observed, with exposure to temperatures in excess of 50 °C. The behaviour of type 316L stainless steel in hot caustic environment is compared to types 204, 304, 2205 stainless steel, and nickel alloy 200. Graphic Abstract

Download Full-text

Role of H2O2 in microbially influenced ennoblement of open circuit potentials for type 316L stainless steel in seawater

Corrosion Science ◽

10.1016/j.corsci.2003.09.018 ◽

2004 ◽

Vol 46 (5) ◽

pp. 1291-1300 ◽

Cited By ~ 42

Author(s):

N Washizu ◽

Y Katada ◽

T Kodama

Keyword(s):

Stainless Steel ◽

316L Stainless Steel ◽

Open Circuit ◽

Type 316L ◽

Type 316L Stainless Steel

Download Full-text

Improvement of Pitting Corrosion Resistance of Type 316L Stainless Steel by Potentiostatic Removal of Surface MnS Inclusions

International Journal of Corrosion ◽

10.1155/2012/482730 ◽

2012 ◽

Vol 2012 ◽

pp. 1-6 ◽

Cited By ~ 13

Author(s):

Nobuyoshi Hara ◽

Koichi Hirabayashi ◽

Yu Sugawara ◽

Izumi Muto

Keyword(s):

Stainless Steel ◽

Beneficial Effect ◽

High Purity ◽

Anodic Polarization ◽

316L Stainless Steel ◽

Pitting Potential ◽

Pitting Corrosion Resistance ◽

Type 316L ◽

Commercial Steel ◽

Type 316L Stainless Steel

The beneficial effect of the removal of MnS inclusions on the pitting of stainless steels has been demonstrated in two ways. (1) High-purity Type 316L stainless steel with no inclusions was used as a specimen in the measurement of anodic polarization curves in 0.5 M NaCl and (2) commercial Type 316L stainless steel with MnS and slag-related inclusions was first polarized at different potentials for 30 min in 1 M Na2SO4of pH 3 and then anodic polarization measurements were taken in 0.5 M NaCl. Pitting did not occur in the passive or transpassive region of the high-purity steel. The polarization treatment dissolved MnS and some oxide inclusions (CaO and SiO2) on the surface of the commercial steel. An increase in pitting potential of the commercial steel was noted after treatment at potentials above 0.2 V. At the same time, the number of current spikes due to metastable pits decreased significantly. These results are more likely due to the beneficial effect of removing MnS inclusions from the steel surface rather than the modification effect of the chemical composition of passive films on the surface.

Download Full-text

BIODUR 316LS

Alloy Digest ◽

10.31399/asm.ad.ss0596 ◽

1995 ◽

Vol 44 (6) ◽

Keyword(s):

Stainless Steel ◽

Corrosion Resistance ◽

Physical Properties ◽

Tensile Properties ◽

316L Stainless Steel ◽

Heat Treating ◽

Vacuum Arc ◽

Improve Corrosion Resistance ◽

Type 316L ◽

Type 316L Stainless Steel

Abstract BioDur 316LS stainless steel is a modified version of Type 316L stainless steel to improve corrosion resistance for surgical implant applications. The alloy is vacuum arc remelted. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-596. Producer or source: Carpenter.

Download Full-text

ENDURAMET 316LN

Alloy Digest ◽

10.31399/asm.ad.ss1219 ◽

2015 ◽

Vol 64 (7) ◽

Keyword(s):

Fracture Toughness ◽

Stainless Steel ◽

Corrosion Resistance ◽

Physical Properties ◽

316L Stainless Steel ◽

Heat Treating ◽

Type 316L ◽

Technology Corporation ◽

Carpenter Technology Corporation ◽

Type 316L Stainless Steel

Abstract EnduraMet 316LN stainless is a nitrogen strengthened version of Type 316L stainless steel. This datasheet provides information on composition, physical properties, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-1219. Producer or source: Carpenter Technology Corporation.

Download Full-text