Correlation between climate testing methods and service life prediction for paint systems

Abstract

Ensuring the durability of paintwork materials (PWM) to the effects of climatic factors is a necessary problem, especially when they are used in tropical conditions. Wherein, tests in atmospheric conditions (field test) are the main method for confirming the durability of PWM. With that, accelerated testings of PWM in many cases allow to accelerate the receipt of preliminary results for making a decision to conduct field tests. The search for reliable correlations between the results of field and accelerated tests of PWM has been the subject of research for decades. The identification of these correlations allows to quickly assess the durability of paint coating systems (PCS) to the effects of climatic factors and predict the degradation of their decorative and protective properties. This article presents the results of field tests for 5 years in the marine tropical atmosphere of Vietnam of three PCS for the protection of metals and the results of accelerated tests of the same systems. A correlation was obtained for the degradation of PCS properties in terms of gloss and color. Predicting the service life of PCS was carried out taking into account the recommendations of GOST 9.401-2018.