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Long-Term Mechanical Durability of Coatings

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Protective Coatings

Abstract

The long-term durability of a coating is strongly dependent upon the coating’s resistance to crack growth, which is governed by the stress in the coating and the coating’s fracture energy. Stresses in a coating generally increase as weathering time progresses due to continued cure of the coating, physical aging, and cyclic stresses from thermal and moisture expansion mismatch between the coating and substrate. A coating’s fracture energy generally decreases as weathering progresses due to degradation of the binder network induced by both photooxidation and hydrolysis. The regular cracking patterns observed in most coatings is a result of stress relief around cracks that have already propagated.

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Authors and Affiliations

  1. Ford Motor Company, Dearborn, MI, USA

    Mark E. Nichols

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  1. Mark E. Nichols
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Correspondence to Mark E. Nichols .

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Editors and Affiliations

  1. Axalta Coating Systems, Coatings Technology Center, Wilmington, Delaware, USA

    Mei Wen

  2. Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic

    Karel Dušek

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Nichols, M.E. (2017). Long-Term Mechanical Durability of Coatings. In: Wen, M., Dušek, K. (eds) Protective Coatings. Springer, Cham. https://doi.org/10.1007/978-3-319-51627-1_20

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