Steel Pickling and Passivation is a very important industrial process for steel users, especially for panels, switch gear, transformers and furnaces, long products from like bright bars, wire and rods, bridge building and other structural applications.
Hot rolled steel is used in these applications. The steel has to be pickled or descaled before phosphating and epoxy/aluminium paint coating.
Rass-O’-Nil is a one-step pickling (strong acid replacement) and pre-treatment – poly-phosphate (phosphating or chromating replacement) or passivation that does not produce any waste and has a fast one step process saving time and water.
Rass-O’-Nil® pickles and treats the steel surface and deposits an ultra-fine conductive polymerised metallic phosphate conversion deposit on the metal surface. The treated metal does not have rust and scale, and is ready for painting, powder coating and welding.
Rass-O’-Nil replaces strong acid pickling, descaling, and sand and shot blasting.
Rass-O’-Nil is a “strong acid free” replacement of strong acid pickling e.g. hydrochloric or sulphuric acid pickling steel sheet or coil and long products.
Unlike strong acid pickling and sand or shot blasting, Rass-O’-Nil® does not etch the metal surface.
The Rass-O’-Nil treatment process is clean and produces a scale free and rust resistant poly-phosphated surface without the hazardous acids used for pickling steel. This eliminates hydrogen embrittlement caused by strong acid like hydrochloric or sulphuric acid.
Rass-O’-Nil does not require a protective coat of oil to keep it from corrosion unlike the strong acid pickling or shot blasting process. There is no need for solvent to strip with oil before painting.
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