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Hollow glass microspheres in type Ⅱ Class 1 zinc coating for alternative discussion
In Class 1 zinc-rich epoxy primer, at least more than 80% of the zinc coating to be able to call a Class 1, and the current high zinc prices, affecting the profits of the product.Epoxy zinc-rich primer to sell if it is on the rise, the use of hollow glass microspheres to replace the zinc portion for savings is very significant cost savings, of course, can not be sacrificing too much performance and to meet the national standard.
With the same mass of hollow glass microspheres S38HS to replace zinc, zinc ensure the non-volatile component in the proportion is still more than 80%. Design 6 recipes, hollow glass microspheres proportion from 0 to 5%.
Recipe by salt spray resistance test 7 to 12 recipes can be found under the same conditions as the film thickness, with hollow glass microspheres increases, salt spray resistance coatings decreased, but can meet the national standard class Ⅱ type 1 the requirement that the resistance to salt spray for more than 500h. Reduce formulation costs but indeed very obvious.