SURFACE TREATED METALLIC MATERIAL HAVING EXCELLENT ANTICORROSIVE PERFORMANCE TO DISSIMILAR METAL CONTACT CORROSION AND DISSIMILAR MATERIAL JOINT BODY PROVIDED WITH SURFACE TREATED METALLIC MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a metallic material inexpensively and effectively preventing dissimilar metal contact corrosion even when it is not subjected to electric insulation or complete environmental isolation and to provide a dissimilar metal joint body provided with the metallic material.;SOLUTION: The surface treated metallic material 1 includes an anticorrosive layer 3 on the surface of a metallic mother material 2 formed from a pig iron material or an aluminum alloy material. The anticorrosive layer 3 contains 0.005-1 g/m² one or more selected from a group comprising tetraborate, vanadate, phosphate dihydrate, nitride and tungstate. The anticorrosive layer 3 is preferably one of potassium salt, sodium salt or ammonium salt. The dissimilar joint body is provided with at least the surface treated metallic material 1 as a material of one side.;COPYRIGHT: (C)2010,JPO&INPIT