Problem Solving Forum


February 18 - February 21, 2020

ASTM A780 says zinc-rich paints for repairing hot-dip galvanized damage must contain either between 65-69% metallic zinc by weight or greater than 92% metallic zinc by weight in dry film. Why is only 65-69% or above 92% accepted? Is any zinc-rich paint out of these ranges not suitable for HDG repair?


Selected Answers

From Marco Fabio Ramenzoni of ZINGA METALL BRASIL on February 29, 2020:
In my understanding, the text "between 65-69% meta ...read more

From Marco Fabio Ramenzoni of ZINGA METALL BRASIL on February 26, 2020:
Although not totally clear, ASTM A780 mentions org ...read more

From Julian Hay of JhayCon Inspection and Consulting on February 26, 2020:
The post from Rob Francis regarding zinc has a typ ...read more

From Rob Francis of R A Francis Consulting on February 19, 2020:
According to the AGA web site, the gap is because ...read more

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Tagged categories: Asia Pacific; Coating Application; EMEA (Europe, Middle East and Africa); Latin America; North America; Zinc; Zinc-rich (inorganic); Zinc-rich (organic)