1. PPGI Steel Sheet Cupping test PPGI steel sheet need to have various properties of the general coating. And the film of coil coating also need to withstand deep drawing, bending, drilling, bite and other post processing. Therefore, the requirements of…
During the running of prepainted steel coil coating line, the strip off tracking is a very common fault problem. For example, the horizontal force caused by the installation problems of roller or rack. And there also have the following deviation phenomenon….
A. Color difference 1. Paint itself has a larger color difference. Staff should immediately change the color coated steel sheet coating species. 2. Improper film thickness control caused coating color difference. CAMELSTEEL suggested that staff should promptly adjust the film…
Strip deviation is the most common malfunction during the running of color coating line. Slight deviation of the strip causes the abrasion of the roller surface in each roller. And the mixed color appears on both sides of the color…
Galvanized layers and galvalume layers have their own advantages and disadvantages. 55% Al-Zn-Si plated layer not only sum up the advantages of both, but also overcome their shortcomings. This is because of its special structure of the cladding material. Hot…
Observe if the color coated steel sheet paints have crust, gel, delamination, precipitation, fineness and other conditions, it’s preferably measure the storage stability of the color coated steel sheet paints in accordance with the national standard GB 6753.3-86. 1. Crust…
The chemical composition of galvalume layer in hot-dip galvalume steel products isn’t a specific point or area on phase diagram. It’s a composition with better performance chose according to the need. 1. The choice of aluminum content Aluminum content of aluminum products is…
The determination of cleanliness can be measured by laboratory instruments measurement and simple on-site determination measurement. Instruments measurement is mainly used in the condition that there’s extra high requirement on the color coated substrates cleanliness and coating mechanical properties. Most…
1. Neutral salt spray test. Neutral salt spray test is to put the sample exposed to a neutral sodium chloride atmosphere to the specified time. And then assess the blistering, rust grade and corrosion spread distance on its surface. It is…
When there appear defects on the surface chemical processing section before ppgi steel sheet coating, the first thing is to check if the chromium content of chemical conversion film is controlled at 30-34 mg/m2. In addition, due to the defects…
