Surface technology or surface treatment is the sum of all possibilities to change or optimise the properties of various surfaces. The type of surface is just as important as the process used.
Standard surfaces that are treated in industry are:
- Metal(s)
- Wood
- Plastics
- Mineral and natural surfaces
- Glass
- Ceramics and stone
- paper
- textiles and leather
- and many more
-
Depending on the type of surface and the desired change or optimisation of the properties, the treatment of the respective surface also differs.
Surface treatment is either mechanical or chemical. For the chemical treatment of various surfaces, Donauchem GmbH offers an extensive portfolio of basic and special chemicals and auxiliary materials.
First of all, we provide an overview of the possible variants, processes and tasks of surface treatment:
Functions
|
- Mechanical protection
- Barrier function
- Electrical protection/ function
- Optical protection/ function
- Interaction between interfaces
- Integration of functions
|
- Abrasion, detereoration
- Corrosion protection, hydrophobicity, chemical resistance, permeation, diffusion, insulation, etc.
- Insulation, conductivity
- Absorption, light resistance, reflection, etc.
- Wettability, coatability (painting), biocompatibility, etc.
- Printing
|
Varieties
|
- Modification of material properties
- Coating
|
- Chemical or mechanical processes
- Lacquering, coating, gluing, etc.
|
Process
|
- Chemical pre-treatment
- Mechanical pre-treatment
- Removal or forming
- Coating
|
- Degreasing, cleaning, etching, dissolving, pickling, etc.
- Grinding, brushing, smoothing, polishing, blasting, etc.
- Anodising, burnishing, electro or laser polishing
- Painting, galvanising, anodising, enamelling, galvanising, powder coating, coating
|
Surface protection
A distinction is made here between:
- Hydrophobing/Oleophobing: Protection against water or also oil. A water-repellent or oil-repellent protective layer is built up using suitable additives. For example, to protect masonry, monuments, etc.
- Sealing: also a corresponding protection against external influences such as weathering, UV radiation, chemical impairments. In the broadest sense, this is a sealing impregnation of various surfaces. An impregnation has only limited mechanical or chemical resistance and usually serves as a primer for the subsequent coating.
- Coating: Coating to build up a film-forming protection. Together with the coating and the selection of the right auxiliary agents (additives), the respective surface can be influenced in its properties and its characteristics can be improved.
Possible damage to surfaces:
- Mechanical wear
- Carbonation
- Chemical attack
- Chloride/sulphate attack
- Embrittlement
- Coating embrittlement
Surface finishing
Process of
surface finishing
|
Enamel coatings
Galvanic coatings
Lacquer coatings
Plastic coatings
Thermal spray coatings
Enamel
Ceramic coatings
Reaction coatings
Metallic coatings
Pickling |
Objectives of
surface finishing
|
Wear protection
Corrosion protection
Reduction/prevention of various contaminations
Contamination
Colouring
Glossing
Matting
General resistance |
The basic products of Donauchem GmbH for surface treatment
| Productgroups |
Products |
Qualities/ applications |
| Acids |
Inorganic and organic acids:
- Hydrochloric, sulphuric, nitric, phosphoric, hydrofluoric acids. Methanesulfonic, amidosulfonic acid
- Acetic, formic, citric, lactic acid
- Perchloric acid
- Special organic acids
|
- Technical, chemically pure qualities.
- Semiconductor grades.
- LQ and pharmaceutical qualities.
- Pickling, etching, cleaning, decalcifying etc.
|
Lyes and
aqueous
solutions |
- Sodium hydroxide, potassium hydroxide, ammonia/ammonia water, milk of lime.
- Sodium hypochlorite solution, hydrogen peroxide.
- Sodium and potassium silicate.
- Formaldehyde solution.
- Iron(III) chloride solution, polyaluminium chloride solution.
|
- Technical qualities.
- Cleaning, pickling, oxidation, bleaching, disinfection, etc.
- Precipitation, flocculation.
|
| Solvents |
- Alcohols (ethanol, isopropanol, methanol, butanols, amyl alcohol, etc.).
- Petrols/test petrols/special petrols/isoparaffins, petroleum.
- Ethers/esters/ester alcohols.
- Chlorinated hydrocarbons (per-, trichloroethylene).
- Acetone, various ketones.
- Special solvents (MTBE, THF, m-THF, DMF, DMSO,..).
|
- Technical and chemically pure qualities.
- Semiconductor qualities.
- Cleaning, degreasing
|
|
Solids
Powder products
|
- Caustic potash, caustic soda flakes
- Metal salts. Al,- Mg-, Na-, K-, Cu-, Ni-, Cr-, Fe-, Zn-salts, etc.
- Oxalic acid, tartaric acid, ascorbic acid.
- Benzoic acid, benzoates
- Urea, lime
- Phosphates
- Potassium peroxomonosulphate
|
- Technical and chemically pure qualities.
- Surface treatment, electroplating.
|
Special products
Mixtures
Contract manufacturing |
- Additives (corrosion inhibitors, defoamers, anti-scaling agents, emulsifiers, dispersing agents, etc.)
- Cleaners, etching chemicals, phosphating agents, inhibitors
- Activated carbon
- Contract manufacturing on request and according to development
|
- Surface treatment
- Cleaning
- Water treatment
|
Are you looking for further special products, auxiliaries or additives?
Contact our sales team for more detailed specifications or if you have any questions.
www.donauchem.at