摘要
在90℃、2 500μg/g和25 000μg/g的硼酸溶液中对3种粒度区间B4C/Al样品进行了50天的均匀腐蚀试验。对腐蚀试样进行了增重和形貌研究。结果表明:样品腐蚀程度与颗粒粒度相关,粗颗粒样品腐蚀程度最大,细颗粒、中细颗粒样品腐蚀程度无明显差别;表面缺陷处优先腐蚀,随时间增加形成腐蚀坑;腐蚀产物为Al O(OH)与Al(OH)3;致密的Al(OH)3晶体结构可以起到减缓腐蚀的作用。
The uniform corrosion testing for 50 days in boric acid solution of 90 ℃ , 2 500 μg/g and 25 000 μg/g for B4C/Al samples with three kinds of particle size range was carried out. The weigh gain and morphology of corrosion samples were investigated. The results show that the corrosion is related with the particle size. The corrosion degree of coarse particle samples is the highest. The corrosion degree of fine particle and middle fine particle samples have no obvious difference. The corrosion is prone to occur in surface defects which will form the corrosion pits with the increasing of the time. The corrosion products are AIO（OH） and Al（OH） 3. The dense crystal structure of Al（OH）3 can play a role in impeding corrosion.
出处
《粉末冶金技术》
CAS
CSCD
北大核心
2015年第2期127-132,共6页
Powder Metallurgy Technology
