合金元素对黄铜耐腐蚀性能的影响和作用机理

耐蚀黄铜被广泛地用作电厂、海船冷凝管的热交换材料。本文重点介绍了合金元素对黄铜耐腐蚀性能的影响及其作用的机理。在黄铜中添加一定量稀土可以对熔体进行脱氧、细化晶粒组织、改善杂质元素在合金的形态和分布,并与其他元素结合形成缓蚀剂,提高合金的耐蚀性能。添加稀土是未来发展新型环保黄铜的重要方向。

Effect of Alloying Elements on Corrosion Resistance of Brass and Function Mechanisms

The corrosion resistant brass is widely used as heat-exchanging material,such as the condensation tubes in power plants and sea boats.This paper introduces the effect of alloying elements on the corrosion resistance of brass and their function mechanisms.Addition of rare elements can improve the corrosion resistance of alloy by decreasing the concentration of oxygen,refining the grains,improving the morphology and distribution of impurity elements and forming the corrosion inhibitor with other elements.Therefore,addition of rare elements is an important way to develop new environmental protection type brass.