Assessment of the Impact of Jet-Abrasive Surface Machining on the Formation of Pitting Corrosion

The article provides an assessment of the impact surface defects of rolled stainless steel 08Kh21N6M2Т on its corrosion resistance. To conduct comparative tests for the susceptibility to form pitting corrosion, samples are used with and without jet-abrasive surface machining. It is shown that metal surface defects may indicate structural imperfections in the form of precipitation of chromium carbides and secondary austenite inside δ-ferrite grains. As a result of metallographic and electrochemical studies, it is confirmed that jet-abrasive machining has a negative effect on the rate of general corrosion and resistance to pitting corrosion, while the removal of rolling defects from the stainless steel surface leads to its intense corrosion.