Title: Process for reducing the rate of sludge formation in crystalline phosphatizing baths

Abstract: Disclosed is a process for reducing the rate of sludge formation in a crystalline phosphatizing process. The phosphatizing bath includes 0.005 to 20 g/l of a phosphoric acid ester of an organic condensation product containing an alkylene oxide chain.

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Inventors: Smadja, Dora (Paris, FR)
Decker, Marie-Therese (Gennevilliers, FR)
Derouet, Francoise (Levallois-Perret, FR)
Lorin, Guy (Enghiens-les-Bains, FR)

Application Number: 569733
Filing Date: 1975-04-21
Publication_date: 1976-08-31
Assignee: Oxy Metal Industries Corporation (Warren, MI)
Primary Class(es): 148/250
Other Classes:
US Patent Ref:

2304299	Dec, 1942	Boyle et al.	148/6.
2744555	May, 1956	Nicholson et al.	148/6.
3276916	Oct, 1966	Wurstner	148/6.

Other Refs:
Primary Examiner: Kendall, Ralph S.
Assistant Examiner:
Attorney: Kluegel; Arthur E., Mueller; Richard P., Claeboe; Bertram F.