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02191 CORROSION PROTECTION OF MARINE STRUCTURES BY OPTIMIZED COMBINATION OF CATHODIC POLARIZATION AND INORGANIC Zn COATINGS

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Product Number: 51300-02191-SG
ISBN: 02191 2002 CP
Author: K. K. Baek, H. I. Lee, and S. B. Shin
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This study evaluated the technical feasibility of applying an optimized combination of cathodic polarization (CP) and inorganic Zn coating, the two, common corrosion protection methods employed for marine structures. As an initial step to achieve this goal, batches of inorganic Zn coatings with various thickness were formed on A36 Gr. steel plates. The effects of cathodic polarization parameters, such as CP current density, potential were evaluated to establish the optimum combination to provide better corrosion resistance of the inorganic Zn coated steel plate in natural seawater. Optimum number and arrangement of CP anodes for 3-dimensional mock-up structure of ballast tank were also evaluated by using FEM analysis of potential distribution under CP, and the result was fairly consistent with the experimental data obtained from tests made on the inner surface of a box-type, mock-up structure. It's suggested that thicker inorganic Zn coating... Keywords: analysis, Zn-inorganic primer, calcareous deposits, cathodic protection, marine corrosion, FEM
This study evaluated the technical feasibility of applying an optimized combination of cathodic polarization (CP) and inorganic Zn coating, the two, common corrosion protection methods employed for marine structures. As an initial step to achieve this goal, batches of inorganic Zn coatings with various thickness were formed on A36 Gr. steel plates. The effects of cathodic polarization parameters, such as CP current density, potential were evaluated to establish the optimum combination to provide better corrosion resistance of the inorganic Zn coated steel plate in natural seawater. Optimum number and arrangement of CP anodes for 3-dimensional mock-up structure of ballast tank were also evaluated by using FEM analysis of potential distribution under CP, and the result was fairly consistent with the experimental data obtained from tests made on the inner surface of a box-type, mock-up structure. It's suggested that thicker inorganic Zn coating... Keywords: analysis, Zn-inorganic primer, calcareous deposits, cathodic protection, marine corrosion, FEM
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