超级13Cr油管钢在不同浓度Cl<sup>-</sup>介质中的腐蚀行为

doi:10.11896/j.issn.1005-023X.2018.16.027

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Abstract The corrosion behaviors of super 13Cr tubing steels were investigated by immersion corrosion test in 5%,15%,25% and 35% NaCl solution. The corrosion rate, corrosion morphology, corrosion products and electrochemistry characteristics were analyzed by scanning electron microscope(SEM), energy dispersive spectrometer(EDS), X-ray diffraction (XRD), weight loss and polarization. The results showed that super 13Cr tubing steels had better general corrosion resistance properties in NaCl solution with the concentration of Cl^-less than 35%, and the concentration of Cl^-had influences on the corrosion of super 13Cr tubing steels in a certain degree. With the concentration of Cl^-increased, the corrosion resistance properties of super 13Cr tubing steels decreased,while the tendency of corrosion increased. The higher concentration of Cl^-accelerated the growth of pitting on the surface of the super 13Cr tubing steels, that caused localized corrosion, and then resulted in general corrosion. The corrosion rate increased with the increase of Cl^-concentration, but with the corrosion degree aggravated, the corrosion products became thicker and the covering area increased, which isolated the contact between the substrate and the solution, thus slowing down the corrosion rate. The corrosion products consisted of Fe and Cr oxides.

Key words： super 13Cr tubing steels Cl^-concentration immersion corrosion pitting

Published: 18 September 2018

CLC number:

TG174.2

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	WANG Yifei
	XIE Faqin

Cite this article:

WANG Yifei,XIE Faqin. Corrosion Behaviors of Super 13Cr Tubing Steels in NaCl Solution with Different Concentration[J]. Materials Reports, 2018, 32(16): 2847-2851.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.16.027 OR http://www.mater-rep.com/EN/Y2018/V32/I16/2847

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