In this study, effect of Na2SiO3 center dot 5H(2)O (Na2SiO3) concentration on the two-step peo coating was investigated. The specimens were primarily processed in a solution composed of (NaOH + Na2SiF6 + Na2SiO3 center dot 5H(2)O) for 900 s. The pre-coated specimens were then immersed into secondary solutions containing various Na2SiO3 concentrations and processed for a constant time of 900 s. Scanning electronic microscope (SEM), was used to investigate the structural properties of the coatings while XRD and EDS were used to analyze the elemental and phase composition of the coatings. SEM results revealed that the coatings formed for Na2SiO3 similar to 9 g/L have highly compact layers and least surface porosity similar to 1.18%. From the FWHM and high intensity peak ratios of Mg2SiO4 (112) and Mg (101) phases, it was found that coatings formed in Na2SiO3 similar to 9 g/L solution are highly crystalline and rich in Mg2SiO4 which was further supported by the maximum content of Si in the EDS analysis. From the hardness measurement it was found that the outer layer of the coating have the highest values of hardness and follow increasing trend with Na2SiO3 concentration. However, coating prepared for Na2SiO3 similar to 9 g/L was found to have least difference in hardness values with respect to coating thickness. Finally corrosion analysis of coating was carried out using potentiodynamic polarization in 3.5 wt% NaCl solution which revealed increase in the corrosion current for secondary coatings prepared for 6 g/L and 12 g/L of Na2SiO3, however the coating prepared for 9 g/L of Na2SiO3 was found to have the highest corrosion resistance similar to 627.9 k Omega and corrosion potential similar to-0.19 V. (C) 2017 Elsevier B.V. All rights reserved.
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Changwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South KoreaChangwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South Korea
Ahn, Byung-Hyun
Lee, Dong-Gun
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Changwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South KoreaChangwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South Korea
Lee, Dong-Gun
Cho, Ho-Je
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Changwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South KoreaChangwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South Korea
Cho, Ho-Je
Lee, Seung-Rok
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Changwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South KoreaChangwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South Korea
Lee, Seung-Rok
Ahmed, Faheem
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Changwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South KoreaChangwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South Korea
Ahmed, Faheem
Anwar, M. S.
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Changwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South KoreaChangwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South Korea
Anwar, M. S.
Koo, Bon-Heun
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Changwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South KoreaChangwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South Korea
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Nancy Univ, CNRS, UMR7198, Inst Jean Lamour, F-54506 Vandoeuvre Les Nancy, FranceNancy Univ, CNRS, UMR7198, Inst Jean Lamour, F-54506 Vandoeuvre Les Nancy, France
Barchiche, C. E.
Veys-Renaux, D.
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Nancy Univ, CNRS, UMR7198, Inst Jean Lamour, F-54506 Vandoeuvre Les Nancy, FranceNancy Univ, CNRS, UMR7198, Inst Jean Lamour, F-54506 Vandoeuvre Les Nancy, France
Veys-Renaux, D.
Rocca, E.
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Nancy Univ, CNRS, UMR7198, Inst Jean Lamour, F-54506 Vandoeuvre Les Nancy, FranceNancy Univ, CNRS, UMR7198, Inst Jean Lamour, F-54506 Vandoeuvre Les Nancy, France
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Changwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South KoreaChangwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South Korea
Byeon, Sang Sik
Wang, Kai
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Changwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South KoreaChangwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South Korea
Wang, Kai
Seo, Yong Jun
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Seo, Yong Jun
Jung, Yeon Gil
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Jung, Yeon Gil
Koo, Bon Heun
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Changwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South KoreaChangwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South Korea
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Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R ChinaZhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China
Cai, Jingshun
Cao, Fahe
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Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R ChinaZhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China
Cao, Fahe
Chang, Linrong
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Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R ChinaZhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China
Chang, Linrong
Zheng, Junjun
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Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R ChinaZhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China
Zheng, Junjun
Zhang, Jianqing
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Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China
Chinese Acad Sci, State Key Lab Corros & Protect, Inst Met Res, Shenyang 110016, Peoples R ChinaZhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China
Zhang, Jianqing
Cao, Chunan
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Chinese Acad Sci, State Key Lab Corros & Protect, Inst Met Res, Shenyang 110016, Peoples R ChinaZhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China
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Zhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R ChinaZhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R China
Cao Fa-he
Lin Long-yong
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Zhejiang Univ, Dept Chem Engn, Hangzhou 310027, Peoples R ChinaZhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R China
Lin Long-yong
Zhang Zhao
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Zhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R ChinaZhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R China
Zhang Zhao
Zhang Jian-qing
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Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 11016, Peoples R ChinaZhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R China
Zhang Jian-qing
Cao Chu-nan
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Changwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South KoreaChangwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South Korea
Ahn, Byung-Hyun
Lee, Dong-Gun
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Lee, Dong-Gun
Cho, Ho-Je
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Changwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South KoreaChangwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South Korea
Cho, Ho-Je
Lee, Seung-Rok
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Changwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South KoreaChangwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South Korea
Lee, Seung-Rok
Ahmed, Faheem
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Changwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South KoreaChangwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South Korea
Ahmed, Faheem
Anwar, M. S.
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Anwar, M. S.
Koo, Bon-Heun
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Nancy Univ, CNRS, UMR7198, Inst Jean Lamour, F-54506 Vandoeuvre Les Nancy, FranceNancy Univ, CNRS, UMR7198, Inst Jean Lamour, F-54506 Vandoeuvre Les Nancy, France
Barchiche, C. E.
Veys-Renaux, D.
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Nancy Univ, CNRS, UMR7198, Inst Jean Lamour, F-54506 Vandoeuvre Les Nancy, FranceNancy Univ, CNRS, UMR7198, Inst Jean Lamour, F-54506 Vandoeuvre Les Nancy, France
Veys-Renaux, D.
Rocca, E.
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Nancy Univ, CNRS, UMR7198, Inst Jean Lamour, F-54506 Vandoeuvre Les Nancy, FranceNancy Univ, CNRS, UMR7198, Inst Jean Lamour, F-54506 Vandoeuvre Les Nancy, France
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Changwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South KoreaChangwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South Korea
Byeon, Sang Sik
Wang, Kai
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Changwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South KoreaChangwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South Korea
Wang, Kai
Seo, Yong Jun
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Changwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South KoreaChangwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South Korea
Seo, Yong Jun
Jung, Yeon Gil
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Changwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South KoreaChangwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South Korea
Jung, Yeon Gil
Koo, Bon Heun
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Changwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South KoreaChangwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South Korea
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Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R ChinaZhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China
Cai, Jingshun
Cao, Fahe
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Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R ChinaZhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China
Cao, Fahe
Chang, Linrong
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Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R ChinaZhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China
Chang, Linrong
Zheng, Junjun
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Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R ChinaZhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China
Zheng, Junjun
Zhang, Jianqing
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Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China
Chinese Acad Sci, State Key Lab Corros & Protect, Inst Met Res, Shenyang 110016, Peoples R ChinaZhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China
Zhang, Jianqing
Cao, Chunan
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Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China
Chinese Acad Sci, State Key Lab Corros & Protect, Inst Met Res, Shenyang 110016, Peoples R ChinaZhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China
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Zhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R ChinaZhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R China
Cao Fa-he
Lin Long-yong
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Zhejiang Univ, Dept Chem Engn, Hangzhou 310027, Peoples R ChinaZhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R China
Lin Long-yong
Zhang Zhao
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Zhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R ChinaZhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R China
Zhang Zhao
Zhang Jian-qing
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Zhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R China
Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 11016, Peoples R ChinaZhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R China
Zhang Jian-qing
Cao Chu-nan
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Zhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R China
Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 11016, Peoples R ChinaZhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R China