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Effect of the calcareous deposits on the cathodic protection potential of 10Ni5CrMoV high‐strength steel in a deep‐sea environment by using the response surface methodology
Author(s) -
Xu Hongbo,
Li Lin,
Zhao Yang,
San Hongyu,
Zhang Tao,
Su Xiandong,
Wang Fuhui
Publication year - 2021
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.202011886
Subject(s) - calcareous , cathodic protection , porosity , deep sea , metallurgy , materials science , environmental science , mineralogy , geology , chemistry , composite material , oceanography , electrochemistry , paleontology , electrode
Abstract The effect of deep‐sea environments on the properties of calcareous deposits was studied and we established the mapping relationship between their cathodic protection potential and the temperature ( T ), pressure ( P ), dissolved oxygen (DO), and the properties of the calcareous deposits according to the response surface methodology. This revealed that the calcareous deposits mixed with CaCO 3 and Mg(OH) 2 under cathodic protection. The environment including temperature, pressure, and oxygen content had various impacts on the thickness, porosity, and the ratio of Ca and Mg. Moreover, the calcareous deposits slightly decreased the cathodic protection potential. Therefore, it can be believed that the cathodic protection potential for naked high‐strength steel is also approximately applicable to that covered with calcareous deposits in the deep‐sea environment.