锂对工业纯铜抗腐蚀性能的影响

Effect of Lithium on Anti-Corrosion Ability of Pure Copper

摘要:

研究了在工业纯铜中加入微量锂对其抗腐蚀性能的影响。结果表明：在工业纯铜中加入微量锂会使其在ＮａＣＩ饱和溶液中的抗腐蚀性能有所提高，但当超过一极限值时，其抗腐蚀性能又下降，这是由于锂对纯铜的净化效应及对晶粒大小、组织形态及晶格畸变的影响而产生的综合效应所致，其主要腐蚀机制是吸氧腐蚀和铜及其它夹杂形成的微电池腐蚀。

Abstract:

The effect of trace lithium on the anti corrosion ability of industrially pure copper has been studied. The experimental results show that trace lithium can improve the anti corrosion ability of pure copper in saturated NaCl solution, but the ability decreases with increasing lithium content. The improvement in the anti corrosion property results from the effect of lithium on purification, grain size, microstructure and lattice distortion of copper. The corrosion mechanism is oxidization and electric corrosion between copper and impurities.