Problem Solving Forum
October 17 - October 21, 2022
What makes a coating surface-tolerant?
Lydia Frenzel of Advisory Council on
November 22, 2022:
This is a late answer, but here is the traditional ...read more This is a late answer, but here is the traditional response which came to me around 1995-2000 from John Tanner when he was working for Ameron and from Dr. John Kelly- International Paint. Surface tolerant coatings were being developed. The surface tolerant coating could be applied to a substate which didn't have a consistent profile, ie there might be deep pits, rust, millscale, dust and grit, or chalk or the method might be power tool, hand tool, brush-off blast, water wash. The surface tolerant coating would wet many types of substrates, ie low surface tension- wettability- and it was compatible with existing coatings, i.e. low internal stress as it went from liquid to solid. The surface tolerant coating was relatively insensitive to the presence of "salts" or ionic contaminants on the substrate. The surface tolerant coating could perform in different service environments. It took the Coatings manufacturers years to develop SURFACE TOLERANT COATINGS. The coatings didn't solve all the problems, but surface tolerant coatings provided flexibility for specifiers and provided savings for owners.