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Abstract Aluminium coatings are the most widely used high temperature protective coatings. A small amount of Si can be added in aluminium coatings to further improve the resistance to high temperature corrosion. At present, pack cementation, slurry coating and hot dipping are generally adopted to produce Al and Al-Si coatings. In this work, Si-containing aluminium coatings on Fe and Fe-Cr alloys are made by electrolytic codeposition of Al and Si from fused chloride bath. Smooth, adherent and dense coatings can be produced by fused salt electrolytic co-deposition of Al and Si. The coatings are uniform in thickness which can easily be controlled by the process parameters, such as temperature, time and current density. No subsquent heat treatment is needed after coating. The results of oxidation test at 1000~C and hot corrosion test(using salt-film method) at 900℃ show that Si-containing aluminium coatings have better protective properties then plain aluminium coatings.
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Received: 25 August 1986
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Cite this article:
Zheng Xuejin Cao Tieliang and Shi(Shih) Shengtai(Shanghai Institute of Metallurgy; Academia Siniea). FUSED SALT ELECTROLYTIC CO-DEPOSITION OF Al AND Si AND HIGH TEMPERATURE CORROSION RESISTANCE OF Si-CONTAINING ALUMINIUM COATINGS. J Chin Soc Corr Pro, 1986, 6(4): 249-254.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1986/V6/I4/249
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