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The aging performance of adhesion in color coated steel coil coating

July 27, 2017No CommentsCAMELSTEEL

Color coated steel coil coating adhesion is an important technical indicator to evaluate the quality. At present, T-bend test is used to characterize the adhesion of color coated steel coil coating in domestic and overseas.

However, the part of color coated board will appear rapid deterioration of coating adhesion when the storage time is lengthened. Affecting the normal use of color coated steel sheet.

It was found in the experiment that even the coating with the worst aging performance was used, if the substrate is galvalume substrate, the aging performance of coating adhesion in color coated steel coil is also better. The main reason for this situation is the special surface structure of the galvalume substrate.

When the coating impermeability of colored steel coil is poor, water, oxygen and corrosive ions will penetrate into the surface of the galvalume substrate, then the zinc-rich zone in the interdendritic network is first corroded, and the oxidation product fills the interdendritic interstice, thereby reducing the corrosion rate.

So the aging performance of coating adhesion in color coated steel coil performance best with this kind of substrate.

About Us

Zibo Camel Material Co., Ltd. was created in 2009 and focus on creating famous steel coil brand – CAMELSTEEL. We are professional manufacturer and trading company of steel coils. Our main products include prepainted galvanized steel coil, prepainted galvalume steel coil, galvanized steel coil , galvalume steel sheet and corrugated roofing sheet etc. .And they are widely applied in the area of building, household appliances, light industry and decoration etc. , both domestic and foreign markets. We adopt advanced production technology in produce process. And there are two color coated steel line, two galvanized line and one galvalume line.

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