Corrosion performance of Al–Al<sub>2</sub>O<sub>3</sub> cold sprayed coatings on mild carbon steel pipe under thermal insulation

Xiaomin Bai; Jianqun Tang; Jianming Gong; Xiaoliang Lü

doi:10.1016/j.cjche.2016.10.004

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Corrosion performance of Al–Al₂O₃ cold sprayed coatings on mild carbon steel pipe under thermal insulation

Materials and Product Engineering | Updated：2026-01-06

- Corrosion performance of Al–Al₂O₃ cold sprayed coatings on mild carbon steel pipe under thermal insulation
- Chinese Journal of Chemical Engineering Vol. 25, Issue 4, Pages: 533-539(2017)
- Affiliations：
  
  School of Mechanical and Power Engineering, Nanjing Tech University,Nanjing,China,211816
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2016.10.004
  CLC：
- Published：2017
- Accepted：
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DOI：

O DOI： 10.1016/j.cjche.2016.10.004.

摘要

Abstract

This paper focused on the corrosion resistance of cold spray Al-Al

composite coatings used on carbon steel pipe surfaces under thermal insulation.Al-Al

coatings were produced on the carbon steel pipe surface by cold spray (CS) technology.Experimental apparatus was built to test the corrosion resistance of coatings beneath mineral wool insulation under isothermal

thermal cycling and wet/dry conditions.The results showed that when α-Al

was added in spraying powder

the coating could obtain higher hardness and a denser microstructure.From corrosionunder-insulation (CUI) tests

Al-Al

CS coatings were proven to be efficient in protecting carbon steel pipe from CUI mainly owning to lamellar microstructures of coatings.There was no evidence to show that α-Al

might bring any negative effect on corrosion resistance.Al-Al

CS coatings were sensitive to the chloride ion concentration.When these coatings were exposed to higher concentrations of NaCl

the coating's exhibited faster degradation.

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Corrosion performance of Al–Al2O3 cold sprayed coatings on mild carbon steel pipe under thermal insulation

DOI：10.1016/j.cjche.2016.10.004

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Abstract

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Corrosion performance of Al–Al₂O₃ cold sprayed coatings on mild carbon steel pipe under thermal insulation