Journal
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
Volume 24, Issue 6, Pages 1978-1988Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S1003-6326(14)63279-9
Keywords
tinplate; alloy layer; reflowing process; galvanic corrosion
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Funding
- National Natural Science Foundation of China [50771092, 21073162]
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Effects of reflowing temperature and time on the alloy layer of tinplate and its electrochemical behavior in 3.5% NaCl solution were investigated by electrochemical measurements and surface characterization. It is found that the amount of alloy layer increases with the increase of reflowing temperature and time. Then the corrosion potential of detinned tinplate shifts positively and the corrosion rate decreases. After being coupled with tin, the detinned tinplate acts as cathode and tin acts as anode initially. However, after being exposed for some time, the potential shifts of both detinned tinplate and tin reverse the polarity of the coupling system. The galvanic current density decreases with the increase of reflowing temperature and time.
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