The surface cleaning and preparation are processes to remove oil, grease, old coatings and surface contaminants and control the size, flatness, and/or roughness of the surface for coating or further finishing. These processes are essential for the success of any protective coating scheme.
There are three basic methods of removing contaminants: Chemical Cleaning, Abrasion and Degreasing.
Chemical Cleaning is popular for preparing metals. It includes treatments which etch the surface to form highly adhering oxides, or deposit complex inorganic coatings.
Abrasion includes sandblasting, vapor honing and use of abrasives cleaning and finishing materials. The dimension of components needs to be watch closely when using abrasion methods.
Degreasing often cleans the surfaces with either a hot alkali solution or solvent vapor. To use either method, surfaces must be free of rust, paint and mill scale.
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SCS surface treatment is environmentally friendly, using only ordinary water, which is even filtered and recirculated during the process. Compare that with acid pickling, which uses vats of...
