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首页> 外文期刊>Corrosion Engineering, Science and Technology >Effect of molybdenum additions on the microstructures and corrosion behaviours of 316L stainless steel-based alloys
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Effect of molybdenum additions on the microstructures and corrosion behaviours of 316L stainless steel-based alloys

机译：钼添加对316L不锈钢基合金微观结构和腐蚀行为的影响

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摘要

Alloys were made by alloying 5, 10, 15, 17.5 and 20wt-% Mo with Type 316L stainless steel. Sigma phases containing 21-29wt-% Mo formed along the austenite grain boundaries with the addition of 5wt-% Mo and increased with additions up to 15wt-% Mo, but they decreased with further additions. Laves phases containing 33-40wt-% Mo co-precipitated at additions of 10wt-% Mo which increased with further Mo increases. The corrosion resistance, assessed by potentiodynamic polarisation in a 10mM NaCl solution adjusted to pH 4, increased relative to Type 316L for alloys made with 5 and 10wt-% added Mo, but decreased with further additions due to preferential corrosion of the Laves phase. The alloy made with 10wt-% added Mo had the highest corrosion resistance due primarily to the high Mo content of the austenite.
机译：用型316L不锈钢的合金5,10,15,17.5和20wt％Mo制成合金。 含有沿奥氏体晶界形成的21-29wt％的Mo的σ相，加入5wt％的Mo并增加高达15wt％的Mo，但它们随着另外的添加而降低。 含有33-40wt-％Mo的Laves相以加入10wt％的Mo共沉淀，其增加，随着Mo的进一步增加而增加。 通过调节至pH 4的10mM NaCl溶液中的电位动力学偏振评估的耐腐蚀性相对于用5和10wt-％加入的Mo制备的合金的316L型增加，但由于Laves阶段的优先腐蚀，进一步添加了进一步的添加。 用10WT-％添加的Mo制成的合金主要是抗腐蚀性的最高耐腐蚀性奥氏体的高Mo含量。

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