ISSN 2594-5327
69th ABM International Annual Congress — Vol. 69, Num. 69 (2014)
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Abstract
Cr/CrN bilayer coating was deposited on AISI 440C by Cathodic Arc. The composition and structure of the Cr/CrN coating were investigated by scanning Electron Microscope, X-Ray Diffraction and X-ray Photoelectron Spectroscopy. The results show that crystal structure obtained was CrN phase with preferred [220] orientation. The hardness and adhesion of coating also were studied. The evaluation of erosion-corrosion (EC) on 440C bare and coated with Cr/CrN was performed by carrying out wear tests using a slurry jet with impingement angle 90° at 4 and 8 m/s. Corrosion, erosion and synergism wear rate were evaluated following the procedure described in ASTM G-119-09. This study presents that the synergism wear rate exceeds 40% of the total mass loss for coating and 60% of mass loss for the 440C, being the most aggressive wear component. The increase in impact velocity generated a rise in mass loss for both 440C bare and coated. The Cr/CrN coating offers better corrosion and erosion–corrosion resistance under all the tested conditions.
Cr/CrN bilayer coating was deposited on AISI 440C by Cathodic Arc. The composition and structure of the Cr/CrN coating were investigated by scanning Electron Microscope, X-Ray Diffraction and X-ray Photoelectron Spectroscopy. The results show that crystal structure obtained was CrN phase with preferred [220] orientation. The hardness and adhesion of coating also were studied. The evaluation of erosion-corrosion (EC) on 440C bare and coated with Cr/CrN was performed by carrying out wear tests using a slurry jet with impingement angle 90° at 4 and 8 m/s. Corrosion, erosion and synergism wear rate were evaluated following the procedure described in ASTM G-119-09. This study presents that the synergism wear rate exceeds 40% of the total mass loss for coating and 60% of mass loss for the 440C, being the most aggressive wear component. The increase in impact velocity generated a rise in mass loss for both 440C bare and coated. The Cr/CrN coating offers better corrosion and erosion–corrosion resistance under all the tested conditions.
Keywords
Multilayer coating; Staintess steel; Cathodic arc; erosion-corrosion
Multilayer coating; Staintess steel; Cathodic arc; erosion-corrosion
How to cite
Johanna Alegría-Ortega; Luz Marina Ocampo-Carmona; Fernando Rodríguez; Elena Forlerer; Ignacio Cortes.
EVALUATION OF EROSION-CORROSION BY JET IMPINGEMENT TESTS ON A CR/CRN BILAYER COATING DEPOSITED BY CATHODIC ARC,
p. 9209-9222.
In: 69th ABM International Annual Congress,
São Paulo - Brasil,
2014.
ISSN: 2594-5327, DOI 10.5151/1516-392X-25169
