Problem Solving Forum
February 6 - February 10, 2017
How do you accurately measure the adhesion of inorganic zinc?
Per Gabrielsson of Free Lance Consultations and Inspections on
February 14, 2017:
Dolly test? You will have a thin layer of dry zinc ...read more Dolly test? You will have a thin layer of dry zinc dust on the surface. Cross cut - yes. Coin scratch does not tell of adhesion, but of hydrolyzing.
trevor neale of TF Warren Group on
February 13, 2017:
Only after ensuring the inorganic zinc has reached ...read more Only after ensuring the inorganic zinc has reached full cure should the ASTM 4541 pull test produce repeatable results.
Paiboonsak S of CFT on
February 7, 2017:
An easy way to check is by using coin scratch test ...read more An easy way to check is by using coin scratch test on the paint film. If you see the shiny surface, then the zinc is well adhered to the steel surface.
Yan David of DNVGL on
February 6, 2017:
Use a dolly test. ...read more Use a dolly test.