摘要
研究了在钛铝金属间化合物上涂覆的一种20~40μm厚的新型搪瓷涂层在700℃条件下1000 h高温氧化和硫酸盐+Na Cl热腐蚀600 h的高温腐蚀行为。结果表明,搪瓷涂层具有很高的高温稳定性,在长时间的实验中有效地避免了基体的高温腐蚀,涂层未出现开裂或剥落。在涂层制备过程和高温腐蚀测试过程中,在涂层/基体界面发生了界面反应,形成了由α-Al2O3、Ti O2、Al2Si O5和Al2Ti O5组成的薄氧化物层。
A novel enamel coating of 20~40 μm thick was prepared on γ- Ti Al intermetallics. Of which the air oxidation and(Na, K)2SO4+25%Na Cl(mass fraction) deposits induced hot corrosion were studied in air at 700 ℃ for 1000 and 600 h respectively. It is revealed that the enamel coating was stable, and able to prevent the substrate from high temperature oxidation and hot corrosion during tests. Neither cracks nor spallation of enamel coatings was observed after tests. Interfacial reactions at the coating/substrate interface took place during the coating preparation and high temperature tests, thereby resulted in the formation of a thin oxide layer consisted of α-Al2O3, Ti O2, Al2 Si O5and Al2 Ti O5.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2015年第3期254-258,共5页
Corrosion Science and Protection Technology
基金
国家高技术研究发展计划项目(2012AA03A512)资助
