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

doi:10.1016/j.cjche.2016.10.004

›› 2017, Vol. 25 ›› Issue (4): 533-539.DOI: 10.1016/j.cjche.2016.10.004

• Materials and Product Engineering • 上一篇

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

Xiaomin Bai, Jianqun Tang, Jianming Gong, Xiaoliang Lü

School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, China

收稿日期:2016-04-24 修回日期:2016-10-05 出版日期:2017-04-28 发布日期:2017-06-03
通讯作者: Jianming Gong

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

Xiaomin Bai, Jianqun Tang, Jianming Gong, Xiaoliang Lü

School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, China

Received:2016-04-24 Revised:2016-10-05 Online:2017-04-28 Published:2017-06-03

摘要/Abstract

摘要： This paper focused on the corrosion resistance of cold spray Al-Al₂O₃ composite coatings used on carbon steel pipe surfaces under thermal insulation.Al-Al₂O₃ 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-Al₂O₃ was added in spraying powder,the coating could obtain higher hardness and a denser microstructure.From corrosionunder-insulation (CUI) tests,Al-Al₂O₃ 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-Al₂O₃ might bring any negative effect on corrosion resistance.Al-Al₂O₃ 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.

关键词: Corrosion under insulation(CUI), Cold spray aluminum, Metal-ceramic mixture, Aluminum coating, Chloride ion environment

Abstract: This paper focused on the corrosion resistance of cold spray Al-Al₂O₃ composite coatings used on carbon steel pipe surfaces under thermal insulation.Al-Al₂O₃ 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-Al₂O₃ was added in spraying powder,the coating could obtain higher hardness and a denser microstructure.From corrosionunder-insulation (CUI) tests,Al-Al₂O₃ 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-Al₂O₃ might bring any negative effect on corrosion resistance.Al-Al₂O₃ 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.

Key words: Corrosion under insulation(CUI), Cold spray aluminum, Metal-ceramic mixture, Aluminum coating, Chloride ion environment

Xiaomin Bai, Jianqun Tang, Jianming Gong, Xiaoliang Lü. Corrosion performance of Al–Al₂O₃ cold sprayed coatings on mild carbon steel pipe under thermal insulation[J]. , 2017, 25(4): 533-539.

参考文献

[1] J.A. Richardson, Corrosion of metals under thermal insulation, Br. Corros. J. 22(1987) 155-156.
[2] R. Javaherdashti, Corrosion under insulation (CUI):A review of essential knowledge and practice, J. Mater. Sci. Surf. Eng. 1(2014) 36-43.
[3] A.W.Dana,W.B.DeLong,Topic of themonth-stress-corrosioncracking test, Corrosion 12(1956) 19-20.
[4] S. Caines, F. Khan, J. Shirokoff, W. Qiu, Experimental design to study corrosion under insulation in harsh marine environments, J. Loss Prev. Process Ind. 33(2015) 39-51.
[5] F. De Vogelaere, Corrosion under insulation, Process. Saf. Prog. 28(2009) 30-35.
[6] A. Bahadori, Thermal Insulation Handbook for the Oil, Gas, and Petrochemical Industries, Elsevier, Netherland, 2014.
[7] R.D. Kane, M. Chauviere, K. Chustz, Evaluation of steel and TSA coating in a corrosion under insulation (CUI) environment, Corros 2008, NACE International, 2008.
[8] M. Halliday, Preventing corrosion under insulation-New generation solutions for an age old problem, J. Prot. Coatings Linings 24(2007).
[9] D. Ifezue, F.H. Tobins, V.C. Nettikaden, CUI failure of a hot oil line due to intermittent operations, J. Fail. Anal. Prev. 14(2014) 13-16.
[10] E. Irissou, J.-G. Legoux, B. Arsenault, C. Moreau, Investigation of Al-Al₂O₃ cold spray coating formation and properties, J. Therm. Spray Technol. 16(2007) 661-668.
[11] H.Y. Lee, S.H. Jung, S.Y. Lee, Y.H. You, K.H. Ko, Correlation between Al₂O₃ particles and interface of Al-Al₂O₃ coatings by cold spray, Appl. Surf. Sci. 252(2005) 1891-1898.
[12] D. Ifezue, F.H. Tobins, Risk-based inspection of a crude oil import/export line:The corrosion engineer's role, J. Fail. Anal. Prev. 14(2014) 395-404.
[13] X.M. Bay, J.Q. Tang, J.M. Gong, Failure analysis for the welded elbow at the bottom of the rectifying tower in the alcohol evaporation system, J. Fail. Anal. Prev. 13(2013) 496-501.
[14] Y. Tao, T. Xiong, C. Sun, H. Jin, H. Du, T. Li, Effect of α-Al₂O₃ on the properties of cold sprayed Al/α-Al₂O₃ composite coatings on AZ91D magnesium alloy, Appl. Surf. Sci. 256(2009) 261-266.
[15] T.H. Van Steenkiste, J.R. Smith, R.E. Teets, Aluminum coatings via kinetic spray with relatively large powder particles, Surf. Coat. Technol. 154(2002) 237-252.
[16] R.C. Dykhuizen, M.F. Smith, D.L. Gilmore, R.A. Neiser, X. Jiang, S. Sampath, Impact of high velocity cold spray particles, J. Therm. Spray Technol. 8(1999) 559-564.
[17] Y. Tao, T. Xiong, C. Sun, L. Kong, X. Cui, T. Li, G.-L. Song, Microstructure and corrosion performance of a cold sprayed aluminium coating on AZ91D magnesium alloy, Corros. Sci. 52(2010) 3191-3197.

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

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

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 0

编辑推荐

Metrics

本文评价