苯並三氮唑(BTA)的添加對鋁青銅與AISI4140鋼磨耗腐蝕之影響

Abstract

1, 2, 3-benzotriazole (BTA) could interact with the surfaces of copper and its alloys to form Cu-BTA films in corrosive environments and has long been known as an efficient inhibitor for the general corrosion of copper and its alloys in many industry applications. The purpose of this study is to investigate the effect of BTA additions at different concentrations (1×10^(-3) M and 5×10^(-3) M) on the wear-corrosion protection ability of aluminum bronze sliding against AISI 4140 steel in 3.5 wt.% NaCl solutions. The wear-corrosion experiment was performed in a block-on-ring surface friction manner, aluminum bronze as the block and AISI 4140 steel as the friction ring. The wear conditions were set at different applied normal loads of 10 g, 20 g, 50 g and 100 g under a fixed rotation speed of 200 rpm. The friction force was measured with respect to testing time during the wearing test. The friction coefficient (μ) can be calculated by dividing the friction force by the applied normal load. Also, the wear loss was measured by weighing a specimen before and after the wear-corrosion test. SEM was used to analyze the surface morphology of the specimens after the wear-corrosion test. The experimental results indicated that in a 3.5 wt.% NaCl solution without BTA addition, the friction coefficient and wear loss increased with increasing loads, and the aluminum bronze showed a less wear loss than the AISI 4140 steel. Only a slightly, mechanically worn surface on the aluminum bronze was observed, whereas the AISI 4140 steel showed a serious wear-corrosion surface. After the BTA was added into 3.5 wt.% NaCl solution, both the aluminum bronze and the AISI 4140 steel exhibited a better resistance to wear-corrosion. In particular, a high BTA concentration would lead to a significant decrease in friction coefficient and wear loss.