کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1585282 | 1514913 | 2006 | 7 صفحه PDF | دانلود رایگان |
Novel microstructures consisting of various fractions of tempered martensite, retained austenite and submicron-grained austenite were processed in an AISI 301LN type austenitic stainless steel by reversion annealing of severely cold-rolled strips. Corrosion resistance of the special microstructures was investigated and compared with that of the conventional cold-rolled or annealed grades. Potentiodynamic anodic polarization study showed that the corrosion resistance in an acidic chloride solution (1 M NaCl + 0.1 M HCl, pH 1) is impaired by heavy cold working, but upon annealing it gets improved, faster in the 75% than in the 45% cold-rolled steel. The presence of martensite seems to be the factor reducing the general corrosion resistance. However, the submicron-grained structure exhibits better pitting corrosion resistance than the coarse-grained one in the acidic chloride solution and also in immersion in the ferric chloride solution, where pit initiation takes place preferably at grain boundaries.
Journal: Materials Science and Engineering: A - Volume 431, Issues 1–2, 15 September 2006, Pages 211–217