The importance of underpaint corrosion caused by damage to paint on steel structures

  • Guido Lessa Ribeiro Filho Instituto Federal de Educação Ciência e Tecnologia
  • Rovadávia Ribas Universidade Federal de Ouro Preto
  • Geraldo Donizetti de Paula Universidade Federal de Ouro Preto
DOI: https://doi.org/10.21041/ra.v10i3.357
Keywords: structures, steel, film, painting, corrosion

Abstract

The impact of varying the dry paint film thickness (DFT) on the underpaint corrosion of steel plates obtained from the floor of an offshore oil platform is evaluated. The specimens were all prepared using the same material and paint scheme, and the DFT and exposure conditions in a salt spray chamber were varied and compared with the results obtained in a real situation. The results indicated that corrosion initiated at sites where the paint was damaged, may be more important than corrosion through the undamaged paint due to permeation, even in cases where the DFT is thin. In specimens whose substrates were previously damaged, there were pathological manifestations of osmotic blistering. The underpaint corrosion that occurred after the paint was damaged in the field occurred at an intensity like that observed for the tested specimens.

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Author Biographies

Guido Lessa Ribeiro Filho, Instituto Federal de Educação Ciência e Tecnologia

Effective professor with exclusive dedication, teaching in the disciplines of Projects at IFMG - Federal Institute of Education, Science and Technology of Minas Gerais. Civil Engineer (PUC-Campinas); Stricto Sensu Masters degree in Metallic Construction (UFOP - Federal University of Ouro Preto); Lato Sensu MBA Specialization in Construction and Assembly (FGV/SP - Fundação Getúlio Vargas SP); Lato Sensu Specialization in Administration and Controllership (UFSJ -Federal University of São João del Rei); Lato Sensu Specialization in Teaching (IFMG).

Rovadávia Ribas, Universidade Federal de Ouro Preto

I am teacher of the Civil Engineering Department of the Escola de Minas of the Federal University of Ouro. I hold a doctorate in Civil Engineering, Steel Construction (2013), master's degree in Civil Engineering (2006), Degree in Civil Engineering (1987), Degree in Business Management Secretariat (2002) and specialization in Tutoring for EAD (2010), by Federal University of Ouro Preto (UFOP).

Geraldo Donizetti de Paula, Universidade Federal de Ouro Preto

Possui graduação em Engenharia Civil pela Universidade Federal de Ouro Preto (1989), especialização em estruturas de aço pela Universidade Federal de Ouro Preto (1990), mestrado em Engenharia Civil (Engenharia de Estruturas) pela Universidade de São Paulo (1994) e doutorado em Engenharia Civil (Engenharia de Estruturas) pela Universidade de São Paulo (2002). Atualmente é Professor Titular da Universidade Federal de Ouro Preto. Tem experiência na área de Engenharia Civil, atuando principalmente nos seguintes temas: estruturas de aço, estruturas mistas de aço e concreto, estruturas de madeira, estruturas de concreto, processos construtivos, materiais e componentes de construção.

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Published
2020-09-01
How to Cite
Ribeiro Filho, G. L., Ribas, R., & Donizetti de Paula, G. (2020). The importance of underpaint corrosion caused by damage to paint on steel structures. Revista ALCONPAT, 10(3), 286 - 299. https://doi.org/10.21041/ra.v10i3.357
Issue
Vol. 10 No. 3 (2020): Volume 10, Issue 3, 2020
Section
Basic Research

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