Alumina Induced Crystal Refinement and Enhanced Corrosion Resistance of Phosphate Chemical Conversion Coating on 35CrMnSi Steel. (1st January 2015)

• Record Type: Journal Article
• Authors: Jiang, Cong-cong; Xiao, Gui-yong; Zhao, Xing-chuan; Zhang, Xian; Zhu, Rui-fu; Lu, Yu-peng
• Is Part Of: ECS Electrochemistry Letters. Volume 4:Number 6(2015)
• Page Start: C23
• Page End: C25
• Publication Date: 2015-01-01
• Subjects: 35CrMnSi steel -- Alumina -- Corrosion resistance -- Phosphate chemical conversion -- Ultrasonic irradiation
• DOI: 10.1149/2.0121506eel
• Languages: English
• ISSNs: 2162-8726

Abstract

Abstract : The effects of alumina (Al2 O3 ) addition on the morphology and corrosion resistance of phosphate chemical conversion (PCC) coatings with and without ultrasonic irradiation (UI) on 35CrMnSi steel were investigated by field emission scanning electron microscope and electrochemical experiments. The results revealed that Al2 O3 altered the preferential growth direction of crystals and significantly decreased crystal size. UI was beneficial to the uniform distribution of Al2 O3 particles in the coating. By means of electrochemical analysis, the PCC coating with Al2 O3 addition and UI endowed the bare steel with better corrosion resistance due to its fine and dense microstructure.