CHROMATE-FREE CONVERSION LAYER AND PROCESS FOR PRODUCING THESAME

A chromate-free, chromic and substantially coherent conversion layer based o n zinc or zinc alloys offers a protection against corrosion from about 100 to 1000 h, as proven by the salt spray test of DIN 50021 SS o r ASTM B 117-73 to first corrosion as described by DIN 50961, chapter 10, even when it...

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Hauptverfasser: HULSER, PETER, JANSEN, ROLF, PREIKSCHAT, PATRICIA
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creator HULSER, PETER
JANSEN, ROLF
PREIKSCHAT, PATRICIA
description A chromate-free, chromic and substantially coherent conversion layer based o n zinc or zinc alloys offers a protection against corrosion from about 100 to 1000 h, as proven by the salt spray test of DIN 50021 SS o r ASTM B 117-73 to first corrosion as described by DIN 50961, chapter 10, even when it does not contain other components such as silicate, Cer, aluminium and borate. This conversion layer is clear, transparent, substantially colourless and iridescent, is about 100 nm to 1000 nm thick, hard, adheres well and is stable against wiping.
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subjects APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
CHEMICAL SURFACE TREATMENT
CHEMISTRY
COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
COATING MATERIAL WITH METALLIC MATERIAL
COATING METALLIC MATERIAL
DIFFUSION TREATMENT OF METALLIC MATERIAL
INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL
METALLURGY
PERFORMING OPERATIONS
PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL
SPRAYING OR ATOMISING IN GENERAL
SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
TRANSPORTING
title CHROMATE-FREE CONVERSION LAYER AND PROCESS FOR PRODUCING THESAME
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