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采用草酸腐蚀方法和光学显微分析 ,研究了 0 0 0 Cr2 6 Mo1、0 0 0 Cr30 Mo2和 0 0 0 Cr2 6 Mo1 Nb几种材料对晶间腐蚀的敏感性 .试验表明0 0 0 Cr2 6 Mo1钢在固溶状态下抗腐蚀性良好 ,但在焊后或敏化处理状态存在一定程度的晶间腐蚀敏感性 ,而 0 0 0 Cr2 6 Mo1 Nb钢在三种状态下对晶间腐蚀不敏感 .本试验参照美国 ASTM:A736 - 86标准 (草酸法检测铁素体不锈钢对晶间腐蚀敏感性的规程 )中的 W-试验 .试验结果与 X-试验( Fe2 ( SO4) 3- H2 SO4腐蚀试验 )比较得出草酸腐蚀方法是一种正确、快速而灵敏的检测材料晶间腐蚀的手段 .
The sensitivity to intergranular corrosion of several materials, 0 0 0 Cr 2 6 Mo 1, 0 0 0 Cr 30 Mo 2 and 0 0 0 Cr 2 6 Mo 1 Nb, was studied by using oxalic acid etching method and optical microscopic analysis. The results show that 0 0 0 Cr 2 6 The corrosion resistance of Mo1 steel in solid solution state is good, but there is a certain degree of intergranular corrosion sensitivity after welding or sensitization treatment, but the intergranular corrosion of 0 0 0 Cr2 6 Mo1 Nb steel in 3 states This test is based on the W-test in American ASTM: A736 - 86 (Oxalic acid method for the susceptibility testing of ferritic stainless steels to intergranular corrosion) .The test results are in agreement with those of the X-test (Fe2 (SO4) 3-H2SO4 Corrosion test) compared oxalate corrosion method is a correct, fast and sensitive means of detecting intergranular corrosion.