IRREVERSIBLE DEGRADATION OF PAINT FILMS

The successful coating must respond dynamically to the continuously changing conditions in which it operates. However, a variety of stresses derived from the film formation process itself and from the film's physical response to its environment and to changes in the substrate inevitably weaken even the most stable films. Many chemical changes and other factors are irreversible, because they alter the molecular structure of the film. These reduce or increase molecular weight, progressively modifying film properties. Pigments and other components of the film may also play a part in chemical changes. In coatings, chemical bonds are broken, and new structures and compounds are formed. Some degradation products may be released from the film as volatile fragments; others may be soluble in water. However, all degradative chemical changes are irreversible, and the effects are always permanent. This article, the third in a series of three, attempts to review the agencies, mechanisms, and consequences of irreversible chemical deterioration of coating films.

  • Availability:
  • Corporate Authors:

    Technology Publishing Company

    2100 Wharton Street, Suite 310
    Pittsburgh, PA  United States  15203
  • Authors:
    • Hare, C H
  • Publication Date: 1999-8

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00778212
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 22 1999 12:00AM