TiNで被覆した軟鋼の食塩水中での腐食摩耗について

概要

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The corrosive wear of ion plated TiN thin film formed on mild steel by hollow cathode deposition was investigated in NaCl solution. The results show that the conditions of surface damage are classified into three groups depending upon the magnitude of loads: 1) low load…control of corrosion, 2) medium load…control of corrosion and wear, 3) high load…control of wear.Under the control of corrosion with low load, galvanic corrosion of mild steel occurred at the defects of TiN film causing cave-in and finally breakdown of the thin film. Under the control of wear with high load, low mechanical strength and low hardness of mild steel resulted in plastic deformation of substrate and stepwise breakdown of the film. Adhesive wear was also observed partly.Compared with dry environment, wet environment of aqueous solution gave favourable condition for removal of wear powder, cooling and lubrication on wearing surfaces.
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