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| Abstract No.: |
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Scheduled at:
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Wednesday, September 28, 2011, Saal C2.2 4:50 PM
Pre- & Post-Treatment 1
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| Title: |
Effect of hardness in blasted substrate surface on adhesive strength of sprayed coatings
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| Authors: |
Toru Maruyama* / Kansai Univ., Japan
Takanori Kishita / Graduate School of Kansai University, JAPAN
Takeshi Kobayashi/ Kansai University, JAPAN
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| Abstract: |
The hardness in substrate surface is suggested as one of the factor to define the adhesive strength between the blasted substrate surface and the sprayed coatings. The adhesive strength of Zn-Al sprayed coating increased with increasing dislocation density in the surface of the blasted substrate of a carbon steel although the surface roughness is almost same. The substrate was the carbon steel containing about 0.45mass%C. The sprayed coating is prepared by a wire flame spraying. White alumina grit was used for the blasting material. The hardness and the surface roughness were changed by the angled blasting. The relationship between substrate hardness and adhesive strength showed good correlation. The substrate hardness was measured in about 100 micro-meter depth from the substrate surface. The dislocation density was estimated by a relationship between the dislocation density and the hardness.
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