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Experimental investigation on the corrosion behavior of G20Mn5QT cast steel and butt weld with Q345D steel

机译:G20Mn5QT铸钢与Q345D对接焊缝腐蚀行为的实验研究。

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摘要

The corrosion tests of G20Mn5QT cast steel and butt weld with Q345D steel in wt 3.5% NaCl solution are conducted. The corrosion morphology of the specimens is observed by SEM. It is mainly corrosion pitting for G20Mn5QT cast steel due to the casting defect and the erosion of chloride ions. The corrosion morphology of weld zone and HAZ tends to be uniform corrosion accompanied with pitting corrosion. Welding defect and erosion of chloride ions cause pitting corrosion for weld zone and HAZ. The largest circular radius of the divided circular pits is defined as the maximum radius of the irregular pit.
机译:对G20Mn5QT铸钢和与Q345D钢的对接焊缝在3.5%NaCl溶液中进行了腐蚀试验。用SEM观察样品的腐蚀形态。由于铸造缺陷和氯离子的侵蚀,这主要是G20Mn5QT铸钢的腐蚀点蚀。焊缝区和热影响区的腐蚀形态趋向于均匀腐蚀并伴有点蚀。焊接缺陷和氯离子侵蚀会导致焊接区和热影响区的点蚀。划分的圆形凹坑的最大圆形半径定义为不规则凹坑的最大半径。

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