Conversion coatings / phosphatings
Conversion layers are formed by chemical reactions involving a metal (substrate). In this way, non-metallic, inorganic layers are formed. Conversion coatings form an excellent basis for subsequent treatments such as painting or powder coating. Common substrates are zinc, zinc die cast and aluminium. Coating systems of this type are much more resistant to corrosion than non-treated substrates. The conversion layers are always referred to as passivation layers. Depending on the type, transparent, blue, black or iridescent passivation layers can be produced. The properties such as corrosion protection, friction coefficients or colour can be individually adjusted by after-treatment sequences using suitable top coats. Strictly speaking, phosphatings are conversion layers on steel. But zinc or aluminium can also be phosphated. The layer is formed by a chemical attack on the base material and subsequent precipitation of poorly soluble phosphates. Metal cations from the phosphating solution are involved in the layer-forming phosphating process. Metal cations are provided from the substrate called non-layer-forming phosphatings.
Magnesium
MAGPASS-COAT®Electroless chrome-free process for the production of corrosion-resistant passivation layers on magnesium-based materials |  |
Zinc
riag Pass 417Trivalent temper resistant blue chromate passivation |  |
riag Pass 418Trivalent blue chromate passivation with high corrosion resistance |  |
riag Pass 445Trivalent thick layer passivation with high corrosion resistance |  |
riag Pass 446Trivalent thick layer passivation with high corrosion resistance without cobalt |  |
riag Pass 448Trivalent thick layer passivation with high corrosion resistance |  |
Zinc-Nickel
riag Pass 405Trivalent transparent chromate passivation on zink-nickel layers |  |
Zinc-Iron
riag Pass 430Trivalent black chromate passivation |  |
Zinc Phosphate
riag PZn 940Acidic phosphating agent generating zinc phosphate coatings |  |
riag PZn 941Activating agent for immersion- and spray phosphating processes based on titanium phosphate |  |
riag PZn 950Acidic phosphating agent generating zinc phosphate coatings in immersion processes |  |
Manganese Phosphates
riag PMn 920Activating agent for manganese phosphating processes |  |
riag PMn 922Acidic phosphating agent generating manganese phosphate coatings in immersion processes |  |
Price chart in $ per tonne
Your contact person

riag Oberflächentechnik AG
Enrico Hess
Chief Sales Officer
enrico.hess@riag.ch