Passivation of electroplating coatings

The agent suitable predominantly for the passivation of copper and its alloys, i.e. brass and bronze, with active surface after pickling and degreasing. It is, moreover, capable to inhibit other metals and their alloys, such as silver, steel, cast iron, nickel, zinc and aluminium. It is very convenient for the temporary corrosion protection of metallic parts during their storage and assembly.

A low-foaming emulsion-based corrosion inhibitor without both nitrites and chromates suitable for the passivation of copper, brass, silver and nickel electroplated coatings. The agent is, furthermore, capable to protect steel electroplated substrates even on the spots or places without any coating or coated with inferior quality, e.g. pipes or hollows etc., and is also functioning very well as a non-oil based sealer on both phosphated as well as alkaline blackened substrates where, unlike other oil-based conservation agents, will not impede the following painting. It should be applied by immersion or spraying as the last operation, after the preceding rinse step, just before drying out. The parts passivated may be rinsed in demineralised water as the corrosion inhibitors contained become strongly bonded to the metallic surface and, therefore, the inhibition affect is being retained. The surface passivated is compatible with all types of solvent-based and powder paints. As for the water-based paints, the compatibility should be checked at first as the surface after passivation becomes hydrophobic a bit. The agent features a very high anticorrosion performance and is even functioning at a very low running concentration.