The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 18, 1991
Filed:
Jun. 22, 1989
Werner Rausch, Oberursel, DE;
Metallgesellschaft Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
A process for retarding the formation of incrustation on plant parts in contact with phosphating solutions in phosphating plants and where the working phosphating solution immediately after contacting the metal surface to be phosphated and while the solution is at its working temperature is caused to flow to contact an additionally presented solid surface that is disposed outside the region in which the workpiece metal surface and phosphating solution contact each other. The ratio of the second solid surface area which is contacted by the phosphating solution in the phosphating plant to the surface area of the plant parts in contact with the phosphating solution is at least 2. The solid surfaces preferably consist of metal, metal alloy, ceramics, porcelain, metal oxide, metal phosphate, such as phosphate bath sludge, and/or alkali fluoroaluminate and may be formed as planar and/or profiled plates, regularly or irregularly shaped bodies, spheres, fragments, particulate or finely particulate bulk material beds, wire, chips and/or nonwoven fabrics and may optionally constitute a fixed bed or fluidized bed.