LOW-PH STRESS-CORROSION CRACK-PROPAGATION IN API X-65 LINE PIPE STEEL

Preliminary results of ongoing crack growth studies being performed on an API X-65 line pipe steel in a low-pH cracking environment were reported. Objectives were to reproduce. low-pH crack propagation in the laboratory, to identify a crack driving force parameter, and to evaluate the influence of environmental and mechanical parameters on crack growth A J-integral test technique was used in the study. Significant crack growth was observed. The parameter J appeared fo be a good driving force parameter to describe crack growth.