摘要
用失重法和电化学法系统地研究了碳钢与不锈钢在腐蚀浆料中冲刷与腐蚀的交互作用及其电化学行为。试验表明:①冲刷腐蚀和动态纯腐蚀极化曲线与静态纯腐蚀极化曲线截然不同,两者的腐蚀机理存在本质的差异;②T8钢以腐蚀失重为主,18-8不锈钢以冲刷失重为主,两者的冲刷腐蚀交互作用失重率占其总失重率的60%以上,表明耐蚀不耐磨的18-8不锈钢和耐磨不耐蚀的T8钢在冲刷腐蚀工况中均难以胜任;③T8钢的冲刷腐蚀失重率和交互作用失重率均是18-8不锈钢的6倍以上,表明在液固两相流冲刷腐蚀工况中,材料必须首先具有一定的耐蚀性,然后再考虑提高材料的硬度和耐磨性,这样才能有效地提高材料的耐冲刷腐蚀性能。
The interaction between erosion and corrosion as well as the electrochemical behavior of carbon steel and stainless steel were studied systematically by the weight loss method and the electrochemistry in corrode slurry. The results were shown:①Polarization curves of erosion-corrosion and dynamic pure corrosion were completely different from static corrosion, the corrosion mechanism of the two had essential differences;②The weight loss rate of carbon steels relied mainly on corroding, the weight, loss rate of stainless steels relied mainly on erosion. The weight loss rate of erosion and corrosion of the two was more than 60% of their total weight loss rate, it indicated that carbon steels and stainless steel were difficult with competent in corrode slurry;③Erosion-corrosion weight loss rate and interaction weight loss rate of carbon steel were more than 6 times of stainless steel. For material in acidic slurry the first important point is to ensure the corrosion resistance, and then to oincrease the hardness and wear resistance so as to increase the erosion-corrosion resistance effectively.
出处
《铸造》
CAS
CSCD
北大核心
2003年第4期260-263,共4页
Foundry
基金
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