摘要
采用铝青铜底层，外加厚度为0．1～0．2mm的纯铝涂层可进一步地提高涂层体系的抗氧化性能。900℃加热12h的10次循环氧化试验结果表明，纯铝层的应用有助于提高铝青铜涂层的自封孔能力，在涂层表面形成的增厚富铝氧化膜以及在涂层基体界面上形成的富铝氧化层都对钢铁基体的防护有利。复合涂层体系与试件基体结合可靠，没有早期失效迹象，是一种有希望的高温防护涂层体系。
The performance and effectiveness of arc-sprayed duplex coatings on mild steel was evaluated.The duplex coating structure is comprised of an inner aluminum bronze layer and an outer layer of aluminum 0.1-0.2 mm.Cyclical oxidation test,each lasting 12 hours,was performed in air at 900℃ for ten times.The results demonstrated that the coating had a better oxidation resistance than single aluminum bronze coating.The application of aluminum layer benefits the formation of a thick alumina-rich protective layer on coating surface and the sealing of the pores of coatings at elevated temperature.After one cyclical oxidation test,a continuous Al_2O_3 layer was formed along the interface coating/substrate,which did not make the coating adhesion degraded.The composite coatings provided steel substrate with a good high temperature protection.The composite coating would be a potential candidate for protecting steel substrate at high temperature.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2006年第4期85-88,共4页
Transactions of The China Welding Institution
关键词
电弧喷涂
高温氧化
铝青铜
复合涂层
arc spraying
high temperature oxidation
aluminum bronze
duplex coatings
