铜合金在3.5%NaCl+NH_3(NH_4^+)溶液中的腐蚀磨损行为

CORROSIVE WEAR BEHAVIOR OF COPPER ALLOYS IN 3.5% NaCl+NH_3(NH_4^+) SOLUTION

本文通过测定HA177－2，BFe30－1－1在3．5％NaCl和3．5％NaCl＋NH3（NH4+）溶液中的腐蚀速率、腐蚀磨损率和电化学行为以及观测腐蚀磨损后铜合金的微观形貌，研究了腐蚀后样品的表层性能。实验结果表明，NH3（NH4+）的存在加速了铜合金的腐蚀、腐蚀磨损，使腐蚀电位E(corr)明显负移、腐蚀电流密度i(corr)增加；氨或铵离子对铜合金腐蚀磨损的加速作用与腐蚀磨损过程中的氨致脆性有关。

The corrosion rate, corrosive wear rate and polarization curves of aluminium brass and cupronickel alloy were determined in 3.5%NaCl and 3.5%NaCl+NH3(NH4+)solutions, the wear tracks of copper alloys were observed by SEM, the specific energy of the surface layer after corrosion was also measured by single pendulum scratching test. Experimental results show that the addition of ammonia or ammonium in 3.5%NaCl solution can accelerate the corrosion and corrosive wear of copper alloys, the corrosion potential shifts negativly,the corrosion current density increases. The ammonia or ammonium caused the surface embrittlement of copper alloys during corrosive wear.