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C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
C23C24/00—Coating starting from inorganic powder
C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
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Chemical & Material Sciences
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Chemical Kinetics & Catalysis
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Engineering & Computer Science
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Materials Engineering
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Mechanical Engineering
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Metallurgy
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Organic Chemistry
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Application Of Or Painting With Fluid Materials
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Abstract
Steel products are coated by applying a fluid coating which contains a substance which is at once a solvent and viscous. It contains, in suspension, at least one powdered metallic element. The treated steel is successively dried, re-coated and cleaned and can then be annealed by recrystallisation. The cost of this operation varies with that of the powdered metal, consequently metals of low intrinsic value are more economical. Accordingly, zinc and aluminium are particularly convenient. The process is used to proof finished or semi-finished steel products against corrosion and can be applied to sheet steel and wires.
PROCESS FOR CLEANING, ACTIVATING AND THEN PHOSPHATING SURFACES OF IRON OR IRON ALLOY OR ZINC OR ZINC ALLOY AND OBJECT WITH A PHOSPHATE COATED METAL SURFACE, OBTAINED BY THE PROCESS.