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http://dx.doi.org/10.5695/JKISE.2015.48.6.349

Cavitation Damage Behavior of Inconel 625 Coating Layer by Arc Thermal Spraying Method in Sea Water  

Park, Il-Cho (Division of Marine Engineering, Mokpo National Maritime University)
Kim, Seong-Jong (Division of Marine Engineering, Mokpo National Maritime University)
Publication Information
Journal of the Korean institute of surface engineering / v.48, no.6, 2015 , pp. 349-353 More about this Journal
Abstract
In this paper, arc thermal spray coating was conducted onto the SS400 steel using Inconel 625 wires in order to improve the durability of marine steel structures, and then investigated cavitation damage behavior of Inconel 625 coating layer in sea water. For the Inconel 625 coating layer, surface hardness appeared similar to that of existing high velocity oxy-fuel coating technology with 380~480 HV, but the porosity of about 6 % was larger relatively. During the cavitation experiment, pit damages were originated and grown at the rough surface and pore defect area of Inconel 625 coating layer. And, after the 72 hours of experimental time, weight loss of Inconel 625 coating layer exhibited gradually increasing tendency due to surface damage effect of the undercut.
Keywords
Inconel 625; arc thermal spray; cavitation; sea water;
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