测定了HAl77-2铝黄铜、BFe30-1-1白铜在3.5％NaCI和3.5％NaCI+S~(2-)溶液中的腐蚀速率、腐蚀磨损率和电化学行为;观察了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,S~(2-)的存在加速了铜合金的腐蚀、腐蚀磨损,使E_corr明显负移,i_corr增加;硫离子对铜合金腐蚀磨损的加速作用与腐蚀磨损过程中的硫致脆性有关。
The corrosion rate, corrosive were rate and polarization curves of aluminium brass and cupronickel alloy were determined in 3.5%NaCl and 3.5% NaCl+S2- 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 showed that the addition of sulfide to 3.5%NaCl solution accelerated the corrosion and corrosive wear of copper alloy, shifted the corrosion potential towards negative, and increased the corrosion current density. The acceleration of corrosive wear could be attributed to the surface embrittlement induced by sulfide.
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