Metal treatment – Process of modifying or maintaining internal physical... – Processes of coating utilizing a reactive composition which...
Patent
1989-06-22
1991-06-18
Woo, Jay H.
Metal treatment
Process of modifying or maintaining internal physical...
Processes of coating utilizing a reactive composition which...
118610, 427436, 427444, C23C 2207
Patent
active
050247077
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.
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Durkin II Jeremiah F.
Metallgesellschaft Aktiengesellschaft
Woo Jay H.
LandOfFree
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