Studies on the Influence of Hexadecylamine on Chromate Phosphate Coating on Aluminium |
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| Authors: | T.S.N. Sankara Narayanan M. Subbaiyan |
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| Affiliation: | Department of Analytical Chemistry, University of Madras, Guindy Campus, Madras 600 025, India. |
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| Abstract: | The effect of hexadecylamine (HDA) on a Chromate phosphate coating on aluminium was studied using an optimized Chromate phosphate bath, The addition of HDA was found to decrease the coating weight, but to enhance the coating quality and corrosion resistance. The inhibitory effect of HDA helps in regulating the excessive attack on the metal and its ability to reduce Cr6+ to Cr3+ compensates the possible time delay for the initiation of coating deposition due to the inhibition. |
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| Keywords: | Cobalt electrodeposition acetate baths cathodic polarization cathodic current efficiency anodic-stripping curves throwing power |
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