The accelerated wet-dry cyclic corrosion tests have been carried out of a high strength bainitic steel and 09CuPCrNi. The results indicated that the corrosion resistance of 09CuPCrNi was better than that of the bainit...The accelerated wet-dry cyclic corrosion tests have been carried out of a high strength bainitic steel and 09CuPCrNi. The results indicated that the corrosion resistance of 09CuPCrNi was better than that of the bainitic steel based on the mass loss measurements. The morphology and composition of the rusting products have been investigated in order to realize the mechanism of rust formation on the two steels. The rust scale on both steels was composed of a dense inner layer and a loose outer layer. The inner layer grew thicker and denser as the test proceeding. Both of inner and outer layers were mainly composed of magnetite （Fe3O4） and maghemite （γ-Fe2O3） with a small amount of lepidocrocite （γ-FeOOH） and akaganeite （β-FeOOH）. The rust phase of γ-Fe2O3 was detected in a higher amount of the inner layer, resulting in a much denser inner layer. The inner rust layer of 09CuPCrNi being denser and thicker than that of the high strength bainitic steel was attributed to the alloying elements such as copper, chromium and phosphorus enriched in it. The protective inner rust layer plays an important role in the corrosion resistance of the steel.展开更多
为了研究锻造对建筑耐候钢性能的影响,本文对热轧09CuPCrNi建筑耐候钢试件进行了锻造试验,进行了耐腐蚀性能和耐磨损性能的测试,并与未锻造试样进行对比。采用扫描电镜对试样表面腐蚀形貌和表面磨损形貌进行了分析。结果表明:与未锻造...为了研究锻造对建筑耐候钢性能的影响,本文对热轧09CuPCrNi建筑耐候钢试件进行了锻造试验,进行了耐腐蚀性能和耐磨损性能的测试,并与未锻造试样进行对比。采用扫描电镜对试样表面腐蚀形貌和表面磨损形貌进行了分析。结果表明:与未锻造试样相比,锻后09CuPCrNi建筑耐候钢试样在室温的腐蚀电位正移了79 m V,室温磨损试验15 min后磨损体积减小了6.3×10^(-3)mm^(3)。锻造显著提高了09CuPCrNi建筑耐候钢的耐腐蚀性能和耐磨损性能。展开更多
文摘The accelerated wet-dry cyclic corrosion tests have been carried out of a high strength bainitic steel and 09CuPCrNi. The results indicated that the corrosion resistance of 09CuPCrNi was better than that of the bainitic steel based on the mass loss measurements. The morphology and composition of the rusting products have been investigated in order to realize the mechanism of rust formation on the two steels. The rust scale on both steels was composed of a dense inner layer and a loose outer layer. The inner layer grew thicker and denser as the test proceeding. Both of inner and outer layers were mainly composed of magnetite （Fe3O4） and maghemite （γ-Fe2O3） with a small amount of lepidocrocite （γ-FeOOH） and akaganeite （β-FeOOH）. The rust phase of γ-Fe2O3 was detected in a higher amount of the inner layer, resulting in a much denser inner layer. The inner rust layer of 09CuPCrNi being denser and thicker than that of the high strength bainitic steel was attributed to the alloying elements such as copper, chromium and phosphorus enriched in it. The protective inner rust layer plays an important role in the corrosion resistance of the steel.
文摘为了研究锻造对建筑耐候钢性能的影响,本文对热轧09CuPCrNi建筑耐候钢试件进行了锻造试验,进行了耐腐蚀性能和耐磨损性能的测试,并与未锻造试样进行对比。采用扫描电镜对试样表面腐蚀形貌和表面磨损形貌进行了分析。结果表明:与未锻造试样相比,锻后09CuPCrNi建筑耐候钢试样在室温的腐蚀电位正移了79 m V,室温磨损试验15 min后磨损体积减小了6.3×10^(-3)mm^(3)。锻造显著提高了09CuPCrNi建筑耐候钢的耐腐蚀性能和耐磨损性能。
