COATING LAYER AND CORROSION PROTECTION CHARACTERISTICS IN SEA WATER WITH VARIOUS THERMAL SPRAY COATING MATERIALS FOR STS304

Seong-Jong Kim () and Yong-Bin Woo
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Seong-Jong Kim: Division of Marine Engineering, Mokpo Maritime University, 530-729, Korea
Yong-Bin Woo: Division of Marine Engineering, Mokpo Maritime University, 530-729, Korea

Surface Review and Letters (SRL), 2010, vol. 17, issue 03, 299-305

Abstract: We investigated the optimal method of application and the anticorrosive abilities ofZn,Al, andZn + 15%Alspray coatings in protecting stainless steel 304 (STS304) in sea water. If a defect such as porosity or an oxide layer, causes STS304 to be exposed to sea water, and the thermal spray coating material will act as the cathode and anode, respectively. The Tafel experiments revealed thatAl-coated specimens among applied coating methods had the lowest corrosion current densities. As the corrosion potential decreases with increasing corrosion current density, we estimated the characteristics and lifetime of the protective thermal spray coating layer in the galvanic cell formed by the thermal spray coating layer and STS304.

Keywords: Thermal spray coating; STS304; Tafel experiments; corrosion potential; corrosion current density (search for similar items in EconPapers)
Date: 2010
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DOI: 10.1142/S0218625X10013783

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