Effect of grit blasting of substrate on the corrosion behaviour of plasma-sprayed Al2O3 coatings

E. Çelik; A. Ş Demirkiran; E. Avci

doi:10.1016/S0257-8972(99)00238-8

Effect of grit blasting of substrate on the corrosion behaviour of plasma-sprayed Al₂O₃ coatings

E. Çelik, A. Ş Demirkiran, E. Avci^*

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

55 Citations (Scopus)

Abstract

In this study, the corrosion behaviour of grit-blasted AISI 304L stainless steel substrates coated with Al₂O₃ was investigated in 1 N H₂SO₄ solution. Coatings were produced by employing a plasma-spray process. The phase analysis of powders and coatings was evaluated by means of optical microscopy and X-ray diffractometry. The microstructure of the coating was characterised with optical microscopy. The corrosion rates of these coatings were measured according to ASTM G 31-72 standard. The results indicated that the adherence of Al₂O₃ coatings on the substrate, the surface roughness and the corrosion rate depend on the parameters of grit blasting. It is also found that the corrosion resistance of plasma-sprayed coatings was reduced with increasing surface roughness and increased considerably with decreasing porosity and coating thickness.

Original language	English
Pages (from-to)	1061-1064
Number of pages	4
Journal	Surface and Coatings Technology
Volume	116-119
DOIs	https://doi.org/10.1016/S0257-8972(99)00238-8
Publication status	Published - Sept 1999
Externally published	Yes
Event	Proceedings of the 1998 6th International Conference on Plasma Surface Engineering (PSE-98) - Garmisch-Partenkirchen, Ger Duration: 14 Sept 1998 → 18 Sept 1998

Keywords

AlO coating
Corrosion
Grit blasting

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10.1016/S0257-8972(99)00238-8

Cite this

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title = "Effect of grit blasting of substrate on the corrosion behaviour of plasma-sprayed Al2O3 coatings",

abstract = "In this study, the corrosion behaviour of grit-blasted AISI 304L stainless steel substrates coated with Al2O3 was investigated in 1 N H2SO4 solution. Coatings were produced by employing a plasma-spray process. The phase analysis of powders and coatings was evaluated by means of optical microscopy and X-ray diffractometry. The microstructure of the coating was characterised with optical microscopy. The corrosion rates of these coatings were measured according to ASTM G 31-72 standard. The results indicated that the adherence of Al2O3 coatings on the substrate, the surface roughness and the corrosion rate depend on the parameters of grit blasting. It is also found that the corrosion resistance of plasma-sprayed coatings was reduced with increasing surface roughness and increased considerably with decreasing porosity and coating thickness.",

keywords = "AlO coating, Corrosion, Grit blasting",

author = "E. {\c C}elik and Demirkiran, {A. {\c S}} and E. Avci",

year = "1999",

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doi = "10.1016/S0257-8972(99)00238-8",

language = "English",

volume = "116-119",

pages = "1061--1064",

journal = "Surface and Coatings Technology",

issn = "0257-8972",

publisher = "Elsevier B.V.",

note = "Proceedings of the 1998 6th International Conference on Plasma Surface Engineering (PSE-98) ; Conference date: 14-09-1998 Through 18-09-1998",

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TY - JOUR

T1 - Effect of grit blasting of substrate on the corrosion behaviour of plasma-sprayed Al2O3 coatings

AU - Çelik, E.

AU - Demirkiran, A. Ş

AU - Avci, E.

PY - 1999/9

Y1 - 1999/9

N2 - In this study, the corrosion behaviour of grit-blasted AISI 304L stainless steel substrates coated with Al2O3 was investigated in 1 N H2SO4 solution. Coatings were produced by employing a plasma-spray process. The phase analysis of powders and coatings was evaluated by means of optical microscopy and X-ray diffractometry. The microstructure of the coating was characterised with optical microscopy. The corrosion rates of these coatings were measured according to ASTM G 31-72 standard. The results indicated that the adherence of Al2O3 coatings on the substrate, the surface roughness and the corrosion rate depend on the parameters of grit blasting. It is also found that the corrosion resistance of plasma-sprayed coatings was reduced with increasing surface roughness and increased considerably with decreasing porosity and coating thickness.

AB - In this study, the corrosion behaviour of grit-blasted AISI 304L stainless steel substrates coated with Al2O3 was investigated in 1 N H2SO4 solution. Coatings were produced by employing a plasma-spray process. The phase analysis of powders and coatings was evaluated by means of optical microscopy and X-ray diffractometry. The microstructure of the coating was characterised with optical microscopy. The corrosion rates of these coatings were measured according to ASTM G 31-72 standard. The results indicated that the adherence of Al2O3 coatings on the substrate, the surface roughness and the corrosion rate depend on the parameters of grit blasting. It is also found that the corrosion resistance of plasma-sprayed coatings was reduced with increasing surface roughness and increased considerably with decreasing porosity and coating thickness.

KW - AlO coating

KW - Corrosion

KW - Grit blasting

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U2 - 10.1016/S0257-8972(99)00238-8

DO - 10.1016/S0257-8972(99)00238-8

M3 - Conference article

AN - SCOPUS:0033373182

SN - 0257-8972

VL - 116-119

SP - 1061

EP - 1064

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

T2 - Proceedings of the 1998 6th International Conference on Plasma Surface Engineering (PSE-98)

Y2 - 14 September 1998 through 18 September 1998

ER -

Effect of grit blasting of substrate on the corrosion behaviour of plasma-sprayed Al₂O₃ coatings

Abstract

Keywords

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