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Weathering in Coating Systems-A Bibliographic Study of Causative Agents, Tests and Performance

Journal Name:

  • International Journal of Science and Engineering Investigations

Publication Year:

  • 2017

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Abstract (2. Language): 
The present paper aims to carry out a bibliographic study to determine the main weathering factors and how they degrade coating systems, the most common tests applied, as well as the parameters evaluated and the performance of the coatings usually found in the Brazilian market. The main factors of weathering found were solar radiation, humidity and temperature, each one causing degradation of the coating in different ways. To verify these damages, natural or laboratory exposure tests can be done, evaluating the parameters of interest. The combination of the two types of tests is recommended to estimate the durability of the coating. Regarding the performance of the coatings, it was possible to observe that ones with resins and epoxy primers have low resistance to UV radiation and good performance in high humidity situations. In most of the tests, paints with polyurethane resins presented high performance when exposed to UV radiation, except for epoxy polyurethane ones. It has also been observed that the possible addition of some components such as primers may be beneficial to improve the performance of the coatings in weathering conditions.
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REFERENCES

References: 

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