The role of the paint is to avoid foods with iron metal contact to prevent dissolution of tin; tin tin coating also means that a large area of ​​the surface is not exposed in food, so the tin iron impossible to provide adequate cathodic protection; while coating micro-hole will exist more or less, so paint cans corrosion is inevitable, the way prices are microporous corrosion at the defect site with a tin of food by coating, microporous structure of the film itself, or, damaged or processed form or iron play a role.
    Affected by food ingredients, paints cans of corrosion can be broadly divided into two types:

The first is a diffusion type , that is, after the food produced by melting tin microporous coating , corrosion extended to four weeks , due to the paint tin cans exposed area than a small iron , dissolved iron tin can provide protection in the after considerable degree of corrosion of iron and do not reach the dissolution of a significant decrease in the coating adhesion of the results , and finally separating off the substrate .
   The second is perforated in some foods , the potential difference is small tin iron , or an alloy layer , the potential of tin iron also negative than the potential at this time, the defect in the tin coating is sparingly soluble , Alloy layer will quickly dissolve , as the iron was also dissolved and concentrated in a small area of galvanic corrosion which led to the formation of deep metal perforation.
   Paint cans of corrosion is mainly due to the canning process, the coating scratches, as well as both the film and the porous layer of tin . Sufficient film thickness can be reduced and slowed microporous coating corrosion protection but bad welds or abrasions , especially when canning deep to damage the substrate, will promote corrosion of the tank wall .
    Dongguan Suno Packing  promise beverage packaging company mainly produces easy-open lid , aluminum easy-open ends , tinplate EOE other products, EOE products using health and safety , non-toxic and tasteless high-quality materials , using high-speed production line U.S. MINSTER Presses , Japan AADA punch speed production lines and perfect EOE supporting advanced inspection equipment , make our products attractive appearance refined ; design structural precision, good sealing performance, nothing more than diarrhea , not into the air , to ensure product quality and lasting.