PROCESS TESTING PIPE STEELS FOR CORROSIVE CRACKING UNDER STRESS Russian patent published in 2000 - IPC

FIELD: corrosion testing of pipe steels. SUBSTANCE: process testing pipe steels for corrosive cracking under stress consists in deposition of ring of corrosion-resistant material on sample of corrosive medium to initiate local anodic dissolution. Then tested sample is exposed to action of corrosive medium, is loaded and subjected to cathodic polarization. Cathodic polarization of sample is carried out with density of current 40-500 mA/sq cm at moment of active anodic dissolution to destruction of sample. EFFECT: approximation of testing conditions of sample to actual conditions of its work in corrosive medium which results in increased accuracy of investigation of mechanism of corrosive cracking of main pipe-lines.