Stress Development and Weathering of Organic Coatings

Abstract

Regardless of the mechanism involved in the development of stress in organic coatings due to weathering, when high hygrothermal stresses are induced they can, alone or in combination with fatigue processes, cause coating degradation, such as cracking and/or detachment. It is suggested in this paper that hygroscopic stress participates in formation and/or enlargement of pathways in the coating, which enable the transport of the electrolyte to the metallic substrate provoking its corrosion.