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Effect of Dual-Phase Treatment on the Corrosion Behavior of Weathering Steel 09CuPCrNi

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Abstract:

Dual-phase steels of 09CuPCrNi are prepared through intercritical quenching process. The influences of dual-phase treatment on the corrosion resistant property of the steels have been studied by electrochemical potentiodynamic tests and artificial salt spray tests. The results indicate that the corrosion behavior of DP780 and the as-received weathering steel in 5% sodium hydroxide, 3.5% sodium chloride, 5% sulphuric acid and various concentrations of hydrochloric acid solutions are identical, but dual-phase steels show least corrosion current as compared to the as-received steel. Rust layers of the as-received steel and DP780 are identical mainly consisting of three iron (hydr) oxides, goethite, akaganeite and lepidocrocite, and magnetite. Both the relative amount and morphology of phase constituents affect on the corrosion behavior of DP steels.

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Periodical:

Advanced Materials Research (Volume 740)

Pages:

586-590

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.740.586

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Online since:

August 2013

Authors:

Chun Ling Zhang, Da Yong Cai, Ke Qin Zhang, Bo Liao

Keywords:

Corrosion Behavior, Electrochemical Potentiodynamic, Intercritical Quenching, Rust Layer, Weathering Steel

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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