贫铬区

贫铬区宽度及深度对EPR法灵敏度的影响

The Effect of Width and Depth of the Cr Depletion Zone on the Sensitivity of EPR Method

通过电化学技术，采用模拟贫铬区的钢种研究了敏化奥氏体不锈钢在H2S2O6介质中的应力腐蚀破裂机理。

The stress corrosion cracking ( SCC ) mechanism of sensitized austenitic stainless steels in polythionic acid solutions was studied by means of electrochemical technique , using the sensitized steels to simulate the chromium depleted region .

用电化学方法（EPR法）研究了不同材料和各种敏化条件对奥氏体不锈钢敏化程度的影响，并采用摸拟贫铬区的Fe-11%Ni-Cr（6～18%）钢，研究了EPR法的特性。

By means of electrochemical method ( EPR method ), the effects of various materials and different sensitizing conditions on sensitization degree of Austenic stainless steels are investigated , using the Fe-11 % Ni-Cr ( 6 ~ 18 % ) stainless steels as simulated chromium depleted region .

18铬-8镍型不锈钢中的贫铬区随着敏化时间的发展

The development of chromium - depleted zone in 18-8 stainless steel with time of sensitization

同时，还模拟了晶界贫铬区，进行了一系列电化学试验，探讨了贫铬区的再活化溶解行为。

And then , the chromium depleted region is simulated , a series of electrochemical tests are done and the behaviour of the reactivation dissolve in the chromium depleted region is studied .

研究表明：晶间型应力腐蚀破裂的产生是由于电化学腐蚀与局部应力同时集中在晶界贫铬区，加速裂纹始发并沿晶扩展所致。

It has been found that the occurrence of intergranular SCC was attributed to both electrochemical corrosion and localized stress concentration at chromium depleted grain boundaries , thus crack initiation and propagation along grain boundaries were accelerated .