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http://dx.doi.org/10.14773/cst.2011.10.6.205

Investigation of Corrosion Characteristics with Zn, PTFE Hybrid Coating for SS400 in Sea Water  

Han, Min Su (Division of Marine Engineering, Mokpo Maritime University)
Prak, Jae Cheul (Division of Marine Engineering, Mokpo Maritime University)
Jang, Seok Ki (Division of Marine Engineering, Mokpo Maritime University)
Kim, Seong Jong (Division of Marine Engineering, Mokpo Maritime University)
Publication Information
Corrosion Science and Technology / v.10, no.6, 2011 , pp. 205-211 More about this Journal
Abstract
The severe corrosion environment makes the steel product lifecycle short while Cu-alloys with anti-corrosion characteristic used in sea water are too expensive. This study shows that the Cu-alloy(Cu-37.25% Zn-0.67%Al) used in sea water environment can be superseded by SS400 with various coating process, evaluating electrochemical characteristics. Three coating processes were applied to SS400 such as PTFE + Zn coaing, Zn + PTFE coating and only Zn electrogalvanizing coaing. Various electrochemical experiments such as open circuit potential measurments, potentiodynamic polarization tests and analyses of Tafel constants. Mechanical properties were also measured by tensile test and hardness tests. As a result, Zn + PTFE coating for SS400 steel presented the excellent anti-corrosion characteristic in sea water.
Keywords
corrosion; SS400; coating; electrochemical characteristics;
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