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| Erosion-Corrosion Characteristic of High Velocity Arc Sprayed FeCrAl Coating and 3Cr13 Coating |
| 北京科技大学材料科学与工程学院腐蚀防护中心 |
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Abstract The erosion-corrosion behavior and mechanism of high velocity arc sprayed FeCrAl coating and 3Cr13 coating in acid slurry were studied by liquid-solid two-phase flow erosion-corrosion tester. The morphology of the surfaces after erosion-corrosion was observed using a scanning electron microscope (SEM). It was found that the damage of coatings reinforced as erosion speed increased. The erosion-corrosion mass loss rate of FeCrAl coating was much lower than that of 3Cr13 coating. The FeCrAl coating had better corrosion resistance than the 3Cr13 coating. In the weight loss process of FeCrAl coating erosion was dominating, and corrosion played the same role for 3Cr13 coating. It was observed that the maximum value of erosion-corrosion mass loss rate of both coatings appeared when the erosion angle was at 30 degree. The reason was that the value of the erosion loss rate reached maximum at this angle. Cutting was dominating in erosion-wear mechanism at low angles, while both cutting and impact took effect at high angles.
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Received: 15 November 2006
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