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Evaluation of long-term corrosion durability and self-healing ability of scratched coating systems on carbon steel in a marine environment
Zhao Xia1; Chen Changwei1,2; Xu Weichen1; Zhu Qingjun1; Ge Chengyue1; Hou Baorong1
2017-09-01
Source PublicationCHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
Volume35Issue:5Pages:1094-1107
SubtypeArticle
AbstractDefects in protective-coating systems on steel surfaces are inevitable in practical engineering applications. A composite coating system, including a primer, middle coat and topcoat, were used to protect carbon steel from corrosion in a marine environment. Two environmental additives, glass fibers and thiourea, were applied in the middle coat to modify the coating system. The long-term corrosion durability and self-healing ability of the scratched coating system were evaluated by multiple methods. Results of the electrochemical technologies indicated that the coating system that contained 0.5 wt.% fibers and 0.5 wt.% thiourea presented good corrosion protection and self-healing for carbon steel when immersed in 3.5% NaCl for 120 d. Evolution of localized corrosion factors with time, as obtained from the current distribution showed that fibers combined with thiourea could inhibit the occurrence of local corrosion in scratched coating systems and retarded the corrosion development significantly. Surface characterization suggested that adequate thiourea could be absorbed uniformly on fibers for a long time to play an important role in protecting the carbon steel. Finally, schematic models were established to demonstrate the action of fibers and thiourea on the exposed surface of the carbon steel and the scratched coating system in the entire deterioration process.
KeywordScratched Coating System Corrosion Carbon Steel Long-term Self-healing
DOI10.1007/s00343-017-6132-3
Indexed BySCI
Language英语
WOS IDWOS:000410093300011
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/143162
Collection海洋腐蚀与防护研究发展中心
海洋地质与环境重点实验室
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China
2.Qingdao Technol Univ, Sch Civil Engn, Qingdao 266033, Peoples R China
Recommended Citation
GB/T 7714
Zhao Xia,Chen Changwei,Xu Weichen,et al. Evaluation of long-term corrosion durability and self-healing ability of scratched coating systems on carbon steel in a marine environment[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2017,35(5):1094-1107.
APA Zhao Xia,Chen Changwei,Xu Weichen,Zhu Qingjun,Ge Chengyue,&Hou Baorong.(2017).Evaluation of long-term corrosion durability and self-healing ability of scratched coating systems on carbon steel in a marine environment.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,35(5),1094-1107.
MLA Zhao Xia,et al."Evaluation of long-term corrosion durability and self-healing ability of scratched coating systems on carbon steel in a marine environment".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 35.5(2017):1094-1107.
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