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02369 Study of Leveling Temperature and Its Influence on the Heterogeneity of Temporarily Protective Oil Coatings

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Product Number: 51300-02369-SG
ISBN: 02369 2002 CP
Author: Qingdong Zhong, Zhao Zhang, and Guoding Zhou
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A novel electrochemical method was developed to study the leveling temperature, one of factor influenced the smoothness of temporarily protective oil coatings on the metal substrate. Results showed that higher leveling temperature had no influence on the heterogeneous distributions of corrosion potential and its regularity. However, higher leveling temperature could change the distribution regularity of polarization resistance of oil coatings, although it had no influence on heterogeneous distribution of polarization resistance of oil coatings. With increasing of concentration of oil soluble inhibitor, the distribution of corrosion potentials of oil coatings followed a discontinuous binomial probability distribution, the distribution of anodic polarization resistance (Ra) of oil coatings followed a discontinuous binomial probability distribution, and the distribution of cathodic polarization resistance (Rc) of oil coatings transformed from a discontinuous binomial probability distribution to a continuous binomial probability distribution to a log-normal probability distribution at a higher leveling temperature. Results also showed that higher leveling temperature could improve the homogeneous distribution of corrosion potentials and cathodic polarization resistance of oil coatings, but it could make anodic polarization resistance tended towards heterogeneous distribution. It was suggested that multiple wire electrode could be used to evaluate the coating technology of temporarily protective oil coatings. KEY WORDS: Temporarily protective oil coating; Multiple wire electrode; Leveling temperature
A novel electrochemical method was developed to study the leveling temperature, one of factor influenced the smoothness of temporarily protective oil coatings on the metal substrate. Results showed that higher leveling temperature had no influence on the heterogeneous distributions of corrosion potential and its regularity. However, higher leveling temperature could change the distribution regularity of polarization resistance of oil coatings, although it had no influence on heterogeneous distribution of polarization resistance of oil coatings. With increasing of concentration of oil soluble inhibitor, the distribution of corrosion potentials of oil coatings followed a discontinuous binomial probability distribution, the distribution of anodic polarization resistance (Ra) of oil coatings followed a discontinuous binomial probability distribution, and the distribution of cathodic polarization resistance (Rc) of oil coatings transformed from a discontinuous binomial probability distribution to a continuous binomial probability distribution to a log-normal probability distribution at a higher leveling temperature. Results also showed that higher leveling temperature could improve the homogeneous distribution of corrosion potentials and cathodic polarization resistance of oil coatings, but it could make anodic polarization resistance tended towards heterogeneous distribution. It was suggested that multiple wire electrode could be used to evaluate the coating technology of temporarily protective oil coatings. KEY WORDS: Temporarily protective oil coating; Multiple wire electrode; Leveling temperature
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