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采用腐蚀试验、电化学测试、俄歇能谱和X射线光电子能谱分析技术,评价了Cu对Ni-Cr-Mo耐蚀合金在沸腾温度下的50％H_2SO_4+42g/1Fe2(SO_4)_3、10％HCl酸和40％HF酸中耐蚀性的影响。发现加入适量的Cu显著地提高Ni-Cr-Mo合金在沸腾HF酸中的耐蚀性。腐蚀率由不合铜合金的30～50g/m~2·h降至0.3～0.6g/m~2·h。同时保留了无铜合金的原有耐蚀性能。电化学测试、表面膜分析和相分析结果表明,适量铜的良好作用不在于它使合金显微结构发生变化,而是由于在合金表面上形成富铜膜的结果。
The effects of Cu on the corrosion resistance of Ni-Cr-Mo corrosion resistant alloy at 50% H 2 SO 4 + 42g / 1Fe 2 (SO 4) 3 were evaluated by corrosion test, electrochemical test, Auger spectroscopy and X-ray photoelectron spectroscopy 10% HCl acid and 40% HF acid corrosion resistance. It was found that adding an appropriate amount of Cu significantly improves the corrosion resistance of the Ni-Cr-Mo alloy in boiling HF acid. Corrosion rate from the copper alloy is not 30 ~ 50g / m ~ 2 · h dropped to 0.3 ~ 0.6g / m ~ 2 · h. While retaining the original corrosion-free copper alloy corrosion resistance. Electrochemical tests, surface film analysis and phase analysis showed that the good effect of the proper amount of copper was not that it changed the microstructure of the alloy, but rather the result of the formation of a copper-rich film on the surface of the alloy.