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Accelerated degradation of a chlorinated rubber paint system applied over rusted steel

AuthorsMorcillo, Manuel; Simancas Peco, Joaquín; García Fierro, José Luis ; Feliú Jr., S.; Galván Sierra, Juan Carlos
Issue Date1993
CitationProgress in Organic Coatings 21: 315-325 (1993)
AbstractChlorinated rubber coatings have proved to be effective anticorrosion materials for steel structures. However, their formulation and manufacture must be undertaken with extreme care - particularly as regards the chlorination process and the stabilizers and plasticizers added - in order to avoid early failures. This paper reports on the premature failure of a chlorinated rubber system that was applied directly over uncontaminated rusted steel. The accelerated formation of rust at the steel/paint interface rapidly resulted in complete degradation of the organic coating. Interfacial rust appears to catalyze the cleavage of the C-Cl covalent bonds in the polymer, which gives rise to the formation of chloride ions. These in turn have a dramatic accelerating effect on the corrosion of the base steel, thereby deteriorating the paint system. © 1993.
Identifiersdoi: 10.1016/0033-0655(93)80047-E
issn: 0033-0655
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