Subjected to quenching processing, the samples of weld heat affected zone containing microstructures of martensite in high strength pipeline steel were simulated and prepared. Effects of electropulsing treatment on the corrosion resistance of simulated samples were studied through electrochemical detections and immersion corrosion experiments. It was found that the corrosion resistance of pipeline steel decreased sharply due to the high lattice strains/dislocation densities and residual tensile stress developed after martensite transformation by water quenching. Interestingly, treated by electropulsing the corrosion resistance of simulated weld heat affected zone samples was dramatically improved, and even exceeded that of the base metal when the current density achieved 5.2 kA/mm². After electropulsing treatment, the dislocation density and residual stress of the investigated samples were reduced largely, and the rust layer generated after corrosion was more compact, so that its corrosion resistance was improved.

经过淬火处理，模拟并制备了高强度管线钢中含有马氏体组织的焊接热影响区样品。通过电化学检测和浸没腐蚀实验研究了电脉冲处理对模拟样品耐蚀性的影响。结果表明，由于水淬使马氏体转变后产生的高晶格应变/位错密度和残余拉伸应力，使管线钢的耐蚀性急剧下降。有趣的是，通过电脉冲处理的模拟焊接热影响区样品的耐腐蚀性得到了显着改善，当电流密度达到5.2 kA / mm ²时，甚至超过了母材的耐腐蚀性。。经过电脉冲处理后，所研究样品的位错密度和残余应力大大降低，腐蚀后产生的锈层更加致密，从而提高了其耐腐蚀性。