![]() ![]() automated production on a high-speed line.volume metal purchasing from selected mills.Three factors assure Q-PANEL substrates are consistent, high quality and low cost: Aluminum panels are packed similarly, except without the rust inhibitor. Steel panels are packed in plastic bags in quantities of 20 to 50 panels (depending on type and thickness), with a vapor phase rust inhibitor inside a sturdy cardboard carton, for a shelf life of several years. Special handling assures that all panels are completely clean when they are packaged. The Q-PANEL production process thoroughly cleans panels and removes any oil from the surface. They are clean, consistent, convenient, and economical. Q-PANEL steel and aluminum test substrates from Q-Lab minimize metal variability as a source of bias in critical paint, coating and adhesion tests. Cleaning and phosphating help, but they cannot overcome surface defects formed at the mill. In fact a single mill will often produce both very good and very poor surface quality, depending upon a number of uncontrolled factors. Although some commercial steel provides an excellent surface for coatings, you are just as likely to find steel which gives poor adhesion and poor rust resistance even with good coatings. The result is that ordinary steel is unsuitable for many coatings tests. ![]() Steel stored for a long time with rust inhibiting oil will react to form an incomplete oxide known as oil stain. ![]()
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