Erosion-corrosion behaviors of high velocity arc sprayed Fe−Al/Cr₃C₂ coating

Abstract

Iron aluminide intermetallic coatings were prepared from Fe−Al/Cr₃C₂ cored wires using High Velocity Arc Spraying (HVAS) technology. Erosion and corrosion properties of HVAS sprayed Fe−Al/Cr₃C₂ coatings were investigated. Results show that the erosion at impingement angle of 30° is more than that of 90°. The erosion resistance of coatings was enhanced with the increase of temperature. Coatings had a better erosion resistance than substrates. The erosion changed from ductile behaviors to brittle behaviors above 450°C. At high temperature, the erosion resistances were superior to those at low temperature and room temperature. Coatings had much higher corrosion properties than substrates. The temperature had a little effect on the corrosion resistance of coatings; The corrosion losing of coatings increased slowly with the increase of corrosion time. The HVAS-sprayed Fe−Al/Cr₃C₂ coatings exhibited a high bond strength and hardness.

Keywords

Fe−Al/Cr₃C₂ coatings / high velocity arc spraying / erosion / corrosion

References

[1] Liu G M. Quantitative Characteristics of FeCrAl Films Deposited by Arc and High-velocity Arc Spraying[J]. J. Materials Characterization, 2001, 46: 99-104.

[2] Xu B. Surface Engineering and Maintenance[M], 1996 Beijing: China Machine Press. 303-303. (in Chinese)

[3] Liu Z. Oxidation Behavior of FeAl Intermetallic Coating Produced by Magnetron Sputter Deposition[J]. J. Scripta Materialia, 1998, 39: 1 497-1 502.

[4] Inoue M, Nagao H, Suganuma K. Fractural Properties of Fe-40% Al Matrix Composites Reinforced with Ceramic Particles and Fibers[J]. J. Mater. Sci. Eng. A, 1998, 258: 298-305.

[5] Deevi S C, Sikka V K, Liu C T. Processing, Properties and Applications of Nickel and Iron Aluminides[J]. J. Progress in Materials Science, 1997, 42: 177-192.

[6] Li X. Developments of a Novel Multiplayer Coatings and Studies of Their High Temperature Corrosion Properties[D], 1998 Shenyang: The Metal Research Institute of Chinese Academy of Science. (in Chinese)

[7] Rao K. Mechanical Behavior of Erosion-corrosion Scales on Steel as Characterized by Single-particle Impacts[J]. J. Wear, 1991, 150: 135-152.

[8] An T F, Guan H R, Sun X F, . NaSo-and NaCl induced Hot Corrosion Behaviors of a Nickel-base Superalloy with Aluminide Diffusion Coating[J]. J. Wuhan University of Technology-Mater. Sci. Ed., 2001, 16: 59-62.

[9] Ma B C. Sulfate Resistance Mechanism of High-performance Concrete Containing NCI[J]. J. Wuhan University of Technology-Mater. Sci. Ed., 1999, 14: 6-15.

[10] Jones M. A Comparison of the Abrasive Wear Behavior of HVOF Sprayed Titanium Carbide and Titanium Boride-based Cermet Coatings[J]. J. Wear, 2001, 251: 1 009-1 016.

[11] Edrisy A. The Effect of Humidity on the Sliding Wear of Plasma Transfer Wire Arc Thermal Sprayed Low Carbon Steel Coatings[J]. J. Surface and Coatings Technology, 2001, 146: 571-577.

[12] Wu S P, Nan C W. Microstructure of Steel Fiber Reinforced Polymer Cement-based Composites[J]. J. Wuhan University of Technology-Mater. Sci. Ed., 2002, 17: 47-49.