COMPUTATIONAL IMAGE ANALYSIS AS AN ALTERNATIVE TOOL FOR THE EVALUATION OF CORROSION IN SALT SPRAY TEST

Authors

  • Vitor BONAMIGO MOREIRA Departament d’Enginyeria Química, Universitat Politècnica de Catalunya, Barcelona, Spain; Programa de Pós-graduação em Engenharia de Minas, Metalúrgica e de Materiais (PPGE3M), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil. Corresponding author: vitor.moreira@upc.edu. https://orcid.org/0000-0003-0876-2619
  • Alex KRUMMENAUER Programa de Pós-graduação em Engenharia de Minas, Metalúrgica e de Materiais (PPGE3M), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil. Corresponding author: vitor.moreira@upc.edu. https://orcid.org/0000-0002-9305-0917
  • Jane ZOPPAS FERREIRA Programa de Pós-graduação em Engenharia de Minas, Metalúrgica e de Materiais (PPGE3M), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil. Corresponding author: vitor.moreira@upc.edu. https://orcid.org/0000-0002-3137-297X
  • Hugo Marcelo VEIT Programa de Pós-graduação em Engenharia de Minas, Metalúrgica e de Materiais (PPGE3M), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil. Corresponding author: vitor.moreira@upc.edu. https://orcid.org/0000-0002-8843-8466
  • Elaine ARMELIN Departament d’Enginyeria Química, Universitat Politècnica de Catalunya, Barcelona, Spain. Corresponding author: vitor.moreira@upc.edu. https://orcid.org/0000-0002-0658-7696
  • Alvaro MENEGUZZI Programa de Pós-graduação em Engenharia de Minas, Metalúrgica e de Materiais (PPGE3M), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil. Email: meneguzzi@ufrgs.br. https://orcid.org/0000-0002-9609-2821

DOI:

https://doi.org/10.24193/subbchem.2020.3.04

Keywords:

salt spray test, computational image analysis, corrosion assessment

Abstract

The current standards for evaluating corrosion during salt spray tests rely on the visual analysis of the specimens, and this may be a limitation when higher resolution quantitative outputs are desired. In this work, computational image analysis was used to measure the area affected by corrosion during salt spray tests with aluminum alloy, copper, carbon steel and galvanized steel plates. The software ImageJ was used to select and measure the corroded areas differentiating the corrosion products from the metals uncorroded surfaces according to their different colors. With ten measurements for each selected exposure time, a 95 % confidence interval was calculated for each material and time of exposure, giving an indication of the precision of the estimated corroded area. These data were compared with a visual inspection carried out by an experienced technician. The results indicate that computational image analysis may be a powerful tool to obtain higher resolution in the results interpretation in comparison with the standard visual analysis.

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STUDIA UBB CHEMIA, Volume 65 (LXV), No. 3, September 2020

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Published

2020-09-30

How to Cite

BONAMIGO MOREIRA, V. ., KRUMMENAUER, A. ., ZOPPAS FERREIRA, J. ., VEIT, H. M. ., ARMELIN, E. ., & MENEGUZZI, A. . (2020). COMPUTATIONAL IMAGE ANALYSIS AS AN ALTERNATIVE TOOL FOR THE EVALUATION OF CORROSION IN SALT SPRAY TEST. Studia Universitatis Babeș-Bolyai Chemia, 65(3), 45–61. https://doi.org/10.24193/subbchem.2020.3.04

Issue

Volume 65, No. 3, 2020

Section

Articles

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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