高密度单脉冲电流对H62黄铜腐蚀性能的影响  

Influence of High-Density Single Electropulse on Corrosion Behavior of H62 Brass

作　　者：龙昕[1] 郭晓楠[1] 沈以赴[2] 何冠虎[3] 周本濂[3] 

机构地区：[1]上海交通大学材料科学与工程学院,200030 [2]南京航空航天大学 [3]中科院金属研究所

出　　处：《材料保护》2001年第7期1-3,共3页Materials Protection

摘　　要：为了开辟延长材料使用寿命的新途径 ,研究了高密度单脉冲电流 (HSE)对H62黄铜在NH4 Cl溶液中腐蚀性能的影响 ,发现用HSE处理H62冷轧带材的抗腐蚀性能显著强于未经处理的材料 ,同时也明显好于退火处理的材料。经X ray和透射电镜 (TEM)分别观察发现 ,HSE可以有效地消除样品的内应力 ,样品位错密度明显低于其他两种 ,原因是HSE一方面消除了材料的内应力 ,另一方面减少了材料的内部缺陷 ,降低了表面吸附几率 ,从而显著减缓了H62的应力腐蚀开裂SCC速度。本法能有效地减少材料的内应力腐蚀开裂。In order to develop a new method to prolong the service life of materials, the influence of high density single electropulse (HSE) on corrosion behavior of H62 brass in NH 4CI solution was studied. Comparing with untreated H62 brass and annealed H62 brass, the HSE treated H62 brass has a significantly increased corrosion resistance. The internal stress and the microstructures of H62 brass specimens were analyzed separately by X ray and transmission electron microscopy (TEM). The results show that HSE can eliminate effectively the internal stress and decrease considerably the density of dislocations and the surface absorbability of the H62 brass, thus improving stress corrosion cracking (SCC) resistance of the material.

关 键 词：应力腐蚀 高密度单脉冲电流 黄铜 

分 类 号：TG172[金属学及工艺—金属表面处理]