Journal
SURFACE & COATINGS TECHNOLOGY
Volume 201, Issue 3-4, Pages 1145-1151Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2006.01.042
Keywords
brush plating; XRD; Cu-Sn alloy; corrosion resistance
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Cu-Sn alloy coatings on mild steel substrates produced by the brush plating process have been investigated using XRD, SEM and AFM. X-ray diffraction analysis revealed that the brush plated Cu-Sn alloy was heterogeneous and composed of hexagonal eta-Cu6Sn5, orthorhombic epsilon-Cu3Sn, tetragonal beta-Sn and cubic Cu phases. Uniform surface coverage of the substrate by granular morphology was observed from SEM and AFM. The alloy composition was determined from atomic absorption spectroscopy (AAS). The corrosion protection performance of brush plated Cu-Sn alloy on mild steel has been assessed using salt water immersion and electrochemical corrosion tests. The results indicated a high charge transfer resistance and very low I-Corr for the alloy system comparing with that of individual elements on the substrate and the mild steel substrate. (c) 2006 Elsevier B.V. All rights reserved.
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