Studies on Extraordinary Black Rust Formed on Al-Zn Alloy Coated Steel

Takashi Watanabe, Eiichi Tarumi, Seizo Tsuda
1976 Corrosion engineering digest  
Al(55)-Zn(45) alloy coated steel was developed as a new coated steel for better corrosion resistance. But we found that extraordinary black rust was formed on the steel in the presence of water. A study has therefore been made on the black rust. The main ingredient of black rust formed on the steel was j9-A1203. 3H2O (bayerite) and corrosion products of Zn were hardly detected.
doi:10.3323/jcorr1974.25.9_561 fatcat:b5ynjv4wnfa47ftlp65ibj6e4a