Blistering on Panels

April 5, 2009

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commonly occurring in the marine environment, have on epoxy coating systems.

ASTM method for determining degree of blistering.—————PAGE A9 SSPC conversion method for determining blistering from ASTM method.

This can be a major contaminant, if the clean up after blasting, is not done completely.

The tests found that no blistering occurred if the contamination was below 4 micrograms per square centimeter.

NOTE: THE PANEL BLISTERING WAS RATED BY THE SSPC MODIFICATION A 10 RATING IS PERFECT AND OF THE ASTM D714 BLISTER SCALE.

NOTE: THE PANEL BLISTERING WAS RATED BY THE SSPC MODIFICATION OF THE ASTM D714 BLISTER SCALE.

The contamination levels ran from 1.25-500 MICRO-GRAMS sulphate PER.

COMMENTS ON SERIES # 9 (Note: No graph was done for this series.) This test series (36 tests) was run with various thickness applications of Sovapon over Ferrous Sulphate contamination.

At low contamination levels, this type of blistering did not have active corrosion under still sound blisters.

This two of break down in way of the small grit particles.

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