A Study of the Environment–Friendly Chrome-Free Chemical Conversion Coating on 2024 Aluminium Alloy

Dong Chu Chen; Wen Hui Gong; Zhu Zhou Huang; Wen Fang Li

doi:10.4028/www.scientific.net/MSF.575-578.864

Paper Titles

Study on Computer Emulation of PTFE’s Wearability Improvement by Al³⁺ Ion Implantation
p.843

Influence of Temperature on Field-Induced Reorientation Strain in Magnetic Shape Memory Alloy
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Application and Research of Numerical Simulation for Rubber Like Material with MSC.Marc
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Optimization Design for the Interface Modulus of C_sf/Al Composite
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A Study of the Environment–Friendly Chrome-Free Chemical Conversion Coating on 2024 Aluminium Alloy
p.864

Numerical Simulation of Interfacial Bonding Degradation of Composites under Two-Stage Loading
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Study on the Freeze-to-Crack Test of Asphalt Modified by Waste-PE in Packing
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Mullite Interlayer of C/Si-C-N Composites Fabricated by PIP
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Numerical Simulation of Thermal Induced Crack Propagation in Laminated Composites
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HomeMaterials Science ForumMaterials Science Forum Vols. 575-578A Study of the Environment–Friendly Chrome-Free...

A Study of the Environment–Friendly Chrome-Free Chemical Conversion Coating on 2024 Aluminium Alloy

Abstract:

In order to develop an environment-friendly method of forming a chemical conversion coating on 2024 aluminium alloy surface without the toxic hexavalent chromium compounds, in this paper a process with sodium molybdate and potassium permanganate as the main compositions of the treating bath has been investigated. Solution composition and process parameters have been optimized. The chemical conversion coating has good corrosion resistance, evaluated with dropping test. Micro-structure and components of the conversion coating have been studied by various micro-analysis methods, and the growth mechanism of the chemical conversion coating has also been investigated.