A correctly applied paint system, e.g. a primer-undercoat-gloss, will have the correct components applied in the right order at the appropriate film thicknesses. We can check all of the above provided we are supplied with one or more thumbnail-sized intact flakes that include all the layers present from the topcoat down to the substrate. In some cases all that is required is to section the flake and examine it using optical microscopy. This method will enable us to determine the overall film thickness of the flake. The thickness of the individual layers can also be measured providing there are sufficient differences in colour between them.
The techniques used for the analysis of fully formulated coatings can, in principal, be applied to the identification of the individual layers of a paint flake. In practice the only limitations are the size of the flake and the ease with which it can be dissected to reveal the layer of interest. In situations where an elemental analysis is sufficient, Scanning Electron Microscopy-Energy Dispersive Spectrometry (SEM-EDS) is particularly useful since it enables the elemental composition of the individual paint layers to be determined without the need to dissect out each one.
PRA Irfab have released the first module of the new Global Industrial Coatings Market study, Protective.Read more
Did you miss PRA’s 10th International Woodcoatings Congress? You can now buy a copy of the full proceedings and papers from the European Coatings Website!Read more
We will be closed between Saturday 24th December 2016 and Monday 2nd January 2017.Read more
Notice of Management Buyout of PRA from Pera Technology SolutionsRead more
Welcome to our newest member - Olin Epoxy!Read more
PRA are pleased to welcome M&K Ghana to membership.Read more
PRA is delighted to welcome another new member to the PRA - Dupre MineralsRead more
RT @OCCA_news: OCCA Lecture: Effective use of Silane Technology Monday 8th January 2018 Time: 18:00 – 21:01 Venue: Whitefield Golf Club…
RT @OCCA_news: Happy New Year, a very special year in the life of OCCA - 100 years old this year. I will be mentioning this in the next Pr…
Call for papers released for OCCA centenary conference at Surfex https://t.co/1oaRtikbly