ANALYSIS ON THE CORROSION RATE CHANGES OF AISI 410 STAINLESS STEEL SUBMITTED TO ABRASION-CORROSION IN SIMULATED MARINE CONDITIONS

Due to its diversity of applications in mechanical components such as; turbines, valves and pumps, AISI 410 stainless steel is exposed to combined conditions of mechanical and electrochemical wear. Basic studies on the wear resistance of this martensitic stainless steel have already been carried out, but it still necessary to delve into the tribocorrosion perspective, analyzing the effect of the combined wear forms since it is still been a phenomenon not completely understood. This work presents an analysis on the changes in the electrochemical response of AISI 410 stainless steel in marine abrasion-corrosion conditions, using a novel test rig based on ASTM G105-16 wet abrasion apparatus configuration, with an adapted electrochemical cell. The material was submitted to polarization resistance (Rp), and anodic potentidynamic polarization tests, in both conditions; pure corrosion and abrasion-corrosion. Substitute ocean water (aqueous media), and silica sand (abrasive particles) were used to recreate the agressive marine environment. Potentiodynamic polarization test results do not show a passivation zone of the material when it is submerged in the media. The material does not present a good corrosion resistance under pure corrosion condition contrary to abrasion-corrosion. In addition SEM images analysis sample surface was carried out for each test. Micrograph shows the dominant wear mechanisms are produced by mechanical work.