FN04Mo在七种典型大气环境下的力学性能变化规律及腐蚀机理

doi:10.11896/cldb.20070290

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Abstract In this paper, FN04Mo was prepared by metal injection molding. The mechanical properties and corrosion mechanisms of FN04Mo under se-ven typical atmospheric conditions at Wanning Station, Mohe Station, Dunhuang Station, Lasa Station, Jiangjin Station, Xishuangbanna Station, and Yongxing Station were investigated using electro-hydraulic servo tester, X-ray diffraction analysis, scanning electron microscopy, and energy spectrum analyzer. The results showed that mechanical properties of FN04Mo at the initial stage of corrosion (1—3 months) appeared a significant decreasing trend and remained stable after 3—18 months. After 1 year exposure test in the seven typical atmospheres, the surface of FN04Mo was covered with corrosion products and the surface corrosion pattern is pitting. The SO₂-rich industrial atmosphere (Jiangjin) is the most corrosive. The corrosion products of the samples exposed for 1 year in Jiangjin are α-FeOOH、γ-FeOOH and Fe₃O₄, while the corrosion products of the samples exposed for 9 months in Yongxing are β-FeOOH、γ-FeOOH、Fe₃O₄ and FeOCl. The two atmospheric pollutants, the aggressive Cl^- and polar SO₂, aggravated the corrosion of the FN04Mo matrix in the atmospheric environment. The formation of corrosion pro-ducts and delamination of the FN04Mo sample after atmospheric exposure reduced its effective bearing area and led to significant changes in its mechanical properties.

Key words： FN04Mo atmospheric environment test atmospheric corrosion mechanical property corrosion mechanism

Published: 30 September 2021

CLC number:

TG172.3

Fund:This work was financially supported by the Technical Basic Scientific Research Project(JSHS2017209B001).

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	Articles by authors
	SUN Youmei
	ZHAO Quancheng
	LI Qian
	WANG Ling
	SHE Zuxin
	WANG Changpeng

Cite this article:

SUN Youmei,ZHAO Quancheng,LI Qian, et al. Mechanical Properties and Corrosion Mechanism of the FN04Mo on 7 Kinds of Typical Atmospheric Environment[J]. Materials Reports, 2021, 35(18): 18182-18189.

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http://www.mater-rep.com/EN/10.11896/cldb.20070290 OR http://www.mater-rep.com/EN/Y2021/V35/I18/18182

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