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51313-02415-Crack Resistance Improvement of Inorganic Zinc Rich Paint

Product Number: 51313-02415-SG
ISBN: 02415 2013 CP
Author: Seong-Mo Son
Publication Date: 2013
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$20.00
$20.00

     The internal coating of ship's cargo tanks is essential to protect steel surfaces against corrosion and to avoid contamination. Inorganic ethyl zinc silicate coatings are one of the successful solutions for corrosion protection but there are several disadvantage in this coating system. It is easily contaminated in poros structure and has limitation in recommended film thickness caused by low crack resistance. In spite of these drawbacks inorganic ethyl zinc silicate coatings are generally used for specified chemical products carriers because of its excellent corrision resistance.

     In this study crack resistance was evaluated and enhanced for the increase of maximum allowable dry film thickness. With this increase low crack resistance can be improved and prevent excessive coating thickness. The molecular weights(Mw) of resin pignents and resin composition were analyzed to improve crack resistance of coatings with GPC EDX FT-IR spectroscopy. Seawater immersion and condensation test were performed to evaluate the relationship between hair crack and corrosivity. Maximum allowable dry film thickness was determined based on this corrosion thest.

     The internal coating of ship's cargo tanks is essential to protect steel surfaces against corrosion and to avoid contamination. Inorganic ethyl zinc silicate coatings are one of the successful solutions for corrosion protection but there are several disadvantage in this coating system. It is easily contaminated in poros structure and has limitation in recommended film thickness caused by low crack resistance. In spite of these drawbacks inorganic ethyl zinc silicate coatings are generally used for specified chemical products carriers because of its excellent corrision resistance.

     In this study crack resistance was evaluated and enhanced for the increase of maximum allowable dry film thickness. With this increase low crack resistance can be improved and prevent excessive coating thickness. The molecular weights(Mw) of resin pignents and resin composition were analyzed to improve crack resistance of coatings with GPC EDX FT-IR spectroscopy. Seawater immersion and condensation test were performed to evaluate the relationship between hair crack and corrosivity. Maximum allowable dry film thickness was determined based on this corrosion thest.

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