- 期刊
苯並三氮唑(BTA)的添加對鋁青銅與AISI4140鋼磨耗腐蝕之影響
Effect of BTA Addition on the Wear-Corrosion Resistance of Aluminum Bronze Sliding against AISI 4140 Steel
摘要
苯並三氮唑(1, 2, 3-benzotriazole, BTA)在腐蝕環境中因可與銅生成Cu-BTA膜，而對黃銅具有抑制腐蝕的效果，在工業上常作爲銅合金構件之最佳腐蝕抑制劑。本研究目的爲探討添加BTA於3.5wt.% NaCl水溶液中對鋁青銅與AISI 4140鋼在滑動接觸下的耐磨耗腐蝕性質之影響。實驗時將圓環狀AISI 4140鋼與塊狀鋁青銅在3.5wt.% NaCl溶液中互相對磨，在固定轉速200rpm下，施加不同的負荷分別爲10g、20g、50g與100g，除在3.5wt.% NaCl溶液中，再另外加入不同濃度的BTA（1×10^(-3)M與5×10^(-3)M）來觀察對於鋁青銅與鋼材磨耗腐蝕的改善情形。實驗中記錄摩擦力隨時問的變化再計算成摩擦係數(μ)，實驗後量測重量損失，並以掃描式電子顯微鏡觀察鋁青銅與4140鋼之表面破壞形態。實驗結果顯示在3.5wt.% NaCl水溶液中，鋁青銅有較優越的耐磨耗腐蝕性，具有較低的磨耗損失，表面只有顯示輕微的機械性磨耗，而4140鋼材則顯現嚴重的磨耗腐蝕破壞。而在添加BTA後，對於鋁青銅與AISI 4140鋼材均有磨耗腐蝕的保護性，高濃度BTA更可顯著地降低摩擦係數與重量損失。
並列摘要
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.