Influence of the Substrate Material on Adherence of the Thermal Spray Coatings

Monday, May 7, 2018
Exhibit Halls A-E (Gaylord Palms Resort )
Mr. Jonathan da Veiga Saber , Federal University of Paraná, Curitiba, Brazil
Ms. Samantha Mayumi Zanella Odake , Federal University of Paraná, Curitiba, Brazil
Dr. Gustavo Bavaresco Sucharski , Federal University of Paraná, Curitiba, Brazil
Ms. Irene Bida de Araujo Siqueira Fernandes , Federal University of Paraná, Curitiba, Brazil
Mr. Rodolpho Fernando Vaz , LACTEC Institutes, Curitiba, Brazil
Dr. Ramón Sigifredo Cortés Paredes , Federal University of Paraná, Curitiba, Brazil
The adherence of thermally sprayed coating, particularly those deposited by High Velocity Oxi-Fuel (HVOF), depends on the surface roughness, because the primary bond mechanism is by mechanical anchoring. The objective of this study is to find out if it is possible to obtain the same roughness parameters on different substrates by grit blasting with aluminum oxide, and to verify if there are changes in the adhesive strength of the same coating on the different substrates. The study considers grit-blasting and the roughness obtained on AISI 1020 and AISI 304L substrates. The roughness parameters were measured using a confocal microscope. After statistical analysis, it was verified that the roughness obtained were considered statistically the same, for a 99% confidence level. The results show that the substrate composition does not interfere on the coating adhesion strength.
See more of: Poster Session: Surface Preparation & Coating Adhesion
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