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http://dx.doi.org/10.5695/JKISE.2016.49.4.344

Cavitation-Erosion Characteristics of the Stainless Steel with Adding Ti Stabilizer Element in Sea Water  

Choi, Yong-Won (Gimpo maritime policebox)
Yang, Ye-Jin (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.49, no.4, 2016 , pp. 344-348 More about this Journal
Abstract
Stainless steel is widely applied in many industrial fields due to its excellent anti-corrosion and durability characteristics. However, stainless steel is very vulnerable to cavitation attack caused by high speed flow of fluid in the chloride environments such as marine environment. These conditions promote intergranular corrosion and cavitation-erosion, leading to degradation of the structural integrity and service life. In order to prevent these problems, the stabilized stainless steel is applied to the offshore and shipbuilding industries. In this study, Ti was added to 19%Cr-9%Ni as the stabilizer element with different concentrations (0.26%, 0.71%), and their durabilities were evaluated with cavitation-erosion experiment by a modified ASTM G32 method. The microstructural change was observed with the stabilizer element contents. The result of the observation indicated that the amount of carbide precipitation was decreased and its size became finer with increasing Ti content. In the cavitation-erosion experiment, both weight loss and surface damage depth represented an inverse proportional relationship with the amount of Ti element. Consequently, the stainless steel containing 0.71% of Ti had excellent durability characteristics.
Keywords
Stainless steel; Stabilizer; Ti; Sea water; Cavitation-erosion;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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