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代替タイトル: Effect of P Addition on the Corrosion Resistance of Steels Before and After Rust Formation

説明:

This paper presents the effect of P addition on the corrosion resistance of steels before and after rust formation. Electrochemical measurements and surface analyses of P-containing steels (Fe-0.5 mass%P, Fe-1.0 mass%P, and Fe-1.5 mass%P) were conducted to analyze the contribution of P to their initial corrosion resistance before rust formation. The results showed that the initial corrosion resistance of the steel was worse with higher P content. According to the surface analysis conducted by SEM/EDS, more P-segregations at grain boundaries existed with higher P content. Based on the results of polarization measurements, it was considered that these P-segregation became the initiation sites of localized corrosion, resulting in the decrease in the initial corrosion resistance.
Although the initial corrosion resistance was worse with higher P content, the long-term corrosion resistance was better with higher P content. According to the results of atmospheric exposure tests at Miyakojima and the surface analysis of rust layers, P was incorporated into the rust layer, and it promoted the protective ability against corrosion.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: 腐食, さび, 鉄鋼材料, Fe-P合金, リン, 偏析

刊行年月日: 2024-05-01

出版者: Nippon Tekko Kyokai/Iron and Steel Institute of Japan

掲載誌:

• TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN (ISSN: 18832954) vol. 110 issue. 7 p. 548-557

研究助成金:

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.2355/tetsutohagane.TETSU-2024-005

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更新時刻: 2024-12-20 16:31:23 +0900

MDRでの公開時刻: 2024-12-20 16:31:23 +0900