Study on the Effect of Surface Finishing Methods on Pitting Corrosion Behavior of 304 Stainless Steel Alloy

윤준태; 김세웅; Hyangan Hwang; 손민영; Ihsan-ul-haq Toor

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자료유형: 학술저널

저자정보: 윤준태 김세웅 Hyangan Hwang 손민영 Ihsan-ul-haq Toor

저널정보: 한국부식방식학회 Corrosion Science and Technology Corrosion Science and Technology 제8권 제6호

발행연도: 2009.1

수록면: 209 - 217 (9page)

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In this study the effect of different surface finishing techniques on the pitting corrosion behaviour of a commercial 304 stainless steel alloy was investigated. Surface finishing methods were divided into two categories, i.e. mechanical and chemical. Mechanical treatment methods include power tooling such as grinding,emery paper brushing, stainless steel wire brushing and stainless steel shot blasting. Chemical treatment methods include chemical passivation (phosphoric acid, citric acid, nitric acid) and electro-cleaning (phosphoric acid and citric acid). Potentiodynamic polarization experiments were carried out in 3.5 wt. % NaCl solution at room temp. (20 ℃). The results showed that chemical treatment methods improved the corrosion resistance of stainless steel 304, measured in terms of pitting potential (Epit). Corrosion resistance of the specimens was increased in the order of; electro-cleaning > manual passivation > mechanical cleaning. Surface of electro-cleaned specimens was smoother than rest of the surface treatment methods. Chrome content in chemically treated specimens was higher than in mechanically treated specimens as shown by EDX analysis.

#stainless steel #passivation #surface treatment #corrosion #blasting

참고문헌 (19)

참고문헌 신청

/ / NIDI Reference Book Series No.10 068, Specifying Stainless Steel Surface Treatments

/ / NIDI Reference Book Series No.11 026, fabricating stainless steel for water industry

A. Ben Rhouma / 2001 / Effects of Surface Preparation on Pitting Resistance / Journal of Materials Engineering and Performance 10

A.H. Tuthill / 1992 / Specifiying stainless steel surface treatments (NiDI technical series No 10068) / The Nickel development institute

B.V. Hecke / / The mechanical finishing of decorative stainless steel surfaces / The European stainless steel development association, Materials and application series 6

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