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首页> 外文期刊>Journal of Materials Engineering and Performance >Mechanisms of erosion-corrosion on a cobalt-base alloy and stainless-steel UNS S714400 in aggressive slurries
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Mechanisms of erosion-corrosion on a cobalt-base alloy and stainless-steel UNS S714400 in aggressive slurries

机译：侵蚀性浆料中钴基合金和不锈钢UNS S714400的腐蚀-腐蚀机理

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摘要

Two materials, which are candidates in the construction of drill bits, have been studied in severe liquid-solid impingement conditions. Analysis of the weight loss was carried out on Stellite X40 (Co-base) and UNS S17400 (stainless steel) materials at 30, 60, and 990 angles of impingement under erosion-corrosion conditions at the free-corrosion potential and with applied cathodic protection. A preliminary analysis of the corrosion behavior of the materials in static conditions was the starting point for the electrochemical analysis. A more extensive corrosion analysis under erosion-corrosion conditions was carried out through direct current (DC) potentiodynamic tests with varying angles of impingement. The results were used to identify the contribution of mechanical erosion and electrochemical corrosion for both materials under different angles of impingement and to determine the extent of interaction between corrosion and mechanical-erosion processes.
机译：在严峻的液固碰撞条件下，已经研究了两种材料，它们是钻头构造的候选材料。重量损失的分析是在自由腐蚀电位和施加阴极保护作用下，在腐蚀条件下以30、60和990的撞击角在Stellite X40（钴基）和UNS S17400（不锈钢）材料上进行的。对材料在静态条件下的腐蚀行为的初步分析是电化学分析的起点。通过冲击角度不同的直流（DC）电位动力学测试，在腐蚀腐蚀条件下进行了更广泛的腐蚀分析。结果用于确定两种材料在不同撞击角度下的机械腐蚀和电化学腐蚀的贡献，并确定腐蚀和机械腐蚀过程之间相互作用的程度。

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