GALVANIC CORROSION AND PROTECTION OF OCrl3Ni8Mo2Al STAINLESS STEEL COUPLED WITH ALUMINUM ALLOY AND TITANIUM ALLOY

The galvanic corrosion of 0Crl3Ni8Mo2Al stainless steel coupled with aluminum alloy and titanium alloy was studied by measuring current density of couples. The results indicate that the galvanic corrosion between 0Crl3Ni8Mo2Al stainless steel and aluminum alloy was serious, it is necessary to protect aluminum alloy when it is coupled with 0Crl3Ni8Mo2Al stainless steel. There was little galvanic corrosion between 0Crl3Ni8Mo2Al stainless steel and titanium alloy. The current density of galvanic corrosion of 0Crl3Ni8Mo2Al with aluminium alloy was decreased approximately ten times by plating Cd-Ti plate on the stainless steel. Paint spraying and sealing were effective measures against galvanic corrosion of 0Crl3Ni8Mo2Al stainless steel coupled with aluminum or titanium alloy.