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Wednesday, 18 September 2019
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Raw materials & technologies, Applications

Study into effects on the coverage of organic coatings on rounded steel edges

Tuesday, 1 November 2016

The relationships between edge rounding parameters and edge coverage of organic coating systems are systematically investigated by German researchers.

There is no statistically significant effect of the edge radius on the coverage of organic coating systems over edges. Source: Christina v.R./pixelio.de
There is no statistically significant effect of the edge radius on the coverage of organic coating systems over edges. Source: Christina v.R./pixel...

Three organic coating systems for highly corrosive environments are tested. Two edge-geometry related parameters, namely rounding radius (2 levels) and edge rounding process (5 levels), are considered.

Larger radii do not provide better edge coverage

The edge coverage, as the ratio between dry film thickness at edge and at flat surface, is estimated based on high-resolution microscope inspections on polished cross-sections. The effects are evaluated with a full factorial experimental plan. The Analysis of Variance (ANOVA) reveals that none of the parameters has a statistically determined effect on the edge coverage. In terms if main effects, rounding process and coating system are more indicative than an edge radius. Larger edge radii do not provide a better edge coverage in general.

The study is published in: Progress in Organic Coatings, Volume 101, December 2016, Pages 186–194

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