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研究了Mo、Nb、Ta、Ti合金元素对新型Co-Al-W合金耐腐蚀性能的影响.结果表明,Mo、Nb、Ta、Ti的加入可以提高合金在NaCl溶液中的耐腐蚀性能.相对于9.8W合金,2Mo合金的耐腐蚀性能最好,2Nb和2Ta居中,2Ti合金较差.在不同pH NaCl溶液中,各种合金均会遭受到严重的腐蚀,蚀坑多发生在晶界处.点蚀发生是由于Cl~-从溶液中迁移至蚀孔所致.
The effects of Mo, Nb, Ta and Ti on the corrosion resistance of a new type of Co-Al-W alloy were studied. The results show that the addition of Mo, Nb, Ta and Ti can improve the corrosion resistance of the alloy in NaCl solution. In 9.8W alloy, 2Mo alloy has the best corrosion resistance, 2Nb and 2Ta center, 2Ti alloy is poor.All kinds of alloys suffer from serious corrosion in different pH NaCl solution, and corrosion pits mostly occur at the grain boundaries Pitting occurs due to the migration of Cl ~ - from the solution to the hole.