Corrosion and Stress Corrosion of Arc Welds in 18% Chromium–2% Molybdenum–Titanium Stabilised Stainless Steel
Corrosion and Stress Corrosion of Arc Welds in 18% Chromium–2% Molybdenum–Titanium Stabilised Stainless Steel
复制标题
18% 铬-2% 钼-钛稳定不锈钢电弧焊缝的腐蚀和应力腐蚀
DOI：
10.1179/000705983798274119
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发表时间：
1983
期刊：
影响因子：
--
通讯作者：
T. G. Gooch
中科院分区：
文献类型：
--
作者：
J. Honeycombe;T. G. Gooch
本文研究了焊接对2 ~ 3.5mm厚18%Cr-2%Mo-钛稳定铁素体不锈钢板和9mm厚钢板腐蚀性能的影响。焊接采用手工金属电弧、电弧焊和TIG工艺，并使用匹配的奥氏体不锈钢和镍基耗材。晶间，点蚀和缝隙腐蚀的焊缝进行了评估，使用浸泡和恒电位技术，与应力腐蚀行为进行评估，使用横向焊缝拉伸试样在氯化镁和氯化钙溶液。焊接促进了对晶间侵蚀的某些敏感性，尽管所有焊缝均通过了Strauss弯曲试验的敏感性标准。FeCl 3的耐点蚀和缝隙腐蚀性因焊接而降低。在母材中没有观察到应力腐蚀，但是用不匹配的组合物消耗品制成的接头遭受开裂，尽管敏感性低于与奥氏体钢等级相关的敏感性。它的结论是，在大多数环境条件下，耐腐蚀性的损失，作为焊接的结果将不会显着。为了获得最高的耐腐蚀性，最好使用匹配的成分耗材。
A study has been made of the effect of welding on the corrosion properties of 18%Cr–2%Mo–titanium stabilisedferritic stainless steel sheetfrom 2 to 3·5 mm thickness and 9 mmplate. Welds were made using the manual metal arc, MIG and TIG processes, with matching, austenitic stainless steel and nickel-based consumables. Intercrystalline, pitting and crevice corrosion resistance of welds was evaluated, using immersion and potentiostatic techniques, with stress corrosion behaviour being assessed using transverse weld tensile samples in MgCl2 and CaCl2 solutions. Welding promoted some susceptibility to intercrystalline attack, although all welds passed the Strauss bend test criterion for sensitisation. Resistance to pitting and crevice corrosion in FeCl3 was reduced by welding. No stress corrosion was observed in the parent material, but joints made with non-matching composition consumables suffered cracking, although susceptibility was less than that associated with austenitic grades of steel. It is concluded that in most environmental situations, the loss in corrosion resistance as a result of welding will not be significant. For the highest corrosion resistance, the use of matching composition consumables is preferred.