Abstract

The influence of metallurgical factors on stress corrosion cracking of steels of different classes in an aggressive NACE solution at 25°C is analyzed. The dependences of the stress leading to the transition from active corrosion to the mechanism of hydrogen embrittlement (critical stress) on the yield stress and the coefficient of stress concentration are plotted. The relationship between the critical stress, conditional yield stress, and overstress values is revealed. It is concluded that the loss of corrosion resistance for unalloyed steels with a yield stress below 500 MPa is caused by an increase in the hydrogen concentration during deformation of the material in a corrosive environment.

中文翻译：

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侵蚀性硫化物环境中冶金因素对多种钢应力腐蚀开裂的影响

摘要

分析了冶金因素对25°C侵蚀性NACE溶液中不同种类钢的应力腐蚀开裂的影响。绘制了导致从活性腐蚀过渡到氢脆机制（临界应力）的应力对屈服应力和应力集中系数的依赖性。揭示了临界应力，条件屈服应力和超应力值之间的关系。结论是，屈服应力低于500 MPa的非合金钢的耐腐蚀性损失是由于腐蚀环境中材料变形过程中氢浓度的增加引起的。