某些金属与合金在一定的腐蚀解质中,受拉应力的作用,同时又有电化学腐蚀而导致正常的延陛材料迅速开裂和早期脆性损坏,称为应力腐蚀。应力腐蚀断口宏观上常因有腐蚀产物而呈暗褐色,有时能观察到放射状特征,裂源产生于构件表面,通常为多源。其断口视不同材料和不同解质而有穿晶型及沿晶型,碳钢及合金钢的应力腐蚀断口大都为沿晶开裂,奥氏体不锈钢在Cl~(-1)解质中呈穿晶断裂。 Some metals and alloys in a certain corrosive solution, by the role of tensile stress, while electrochemical corrosion and lead to the normal Yan Li material rapid cracking and early brittle damage, known as stress corrosion. Stress corrosion fracture macroscopic corrosion products often appear dark brown, and sometimes can be observed radial features, cracks originated in the component source, usually multi-source. The fractures depend on different materials and different solutes. The stress corrosion fracture of carbon steel and alloy steel is mostly along the crystal crack. The austenitic stainless steel is worn in the Cl ~ (-1) Crystal breaks.