Compagnie Francaise De Produits Industriels

Compagnie Francaise De Produits

Victor Ken

Joseph Schapira

Louis Cot

Patrice Pelletier

Jean-Henri Durand

Alexandre Askienazy

Francois J Duboys

Jean-Claude Souchet

Jean-Loup Dauptain

Stephane Jelodin

Denis Thery

Francois-Joseph Duboys

Patrick Regnard

Jean C Masson

Christian Hoessler

Method of zinc phosphatization of substrates essentially based on iron, zinc or their alloys, comprising successively:

Method of zinc phosphatization, activation and refining bath used in

Process for the treatment by chemical conversion, within very short spaces of time of substrates of zinc or of one of its alloys especially of continuously zinc coated steel coils, wherein the bath employed in the phosphatization step proper comprises, besides the conventional constituents, a proportion of 0.3 to 2 g/l of Fe.sup.2+ ions, this bath comprising also from 0.2 to 1.5 g/l, preferably from 0.2 to 1.2 gl/ of Zn.sup.2+ ions and from 0.3 to 2 g/l, preferably from 0.3 to 1.2 g/l of Ni.sup.2+ ions, the weight ratios

Process for the treatment by chemical conversion of substrates of zinc

Chemical conversion bath with zinc characterized by the fact that it comprises, besides the conventional constituents, an effective amount of fluorophosphate ion of the formula:

Bath and process for the chemical conversion of metal substrates with

The invention relates to a composition and a process for the treatment, more precisely the 'post-treatment' of phosphatized metal surfaces, particularly when the surfaces must be subsequently covered with a coat of paint. It relates also to a process for the preparation of the composition and a concentrate useful for this preparation. The composition comprises an effective proportion of trivalent titanium compound and it is presented with an acid pH, the proportion of said compound being sufficient for the corresponding composition to confer on the treated metal surface a protection equivalent to that obtained with known chromatizing solutions. More particularly, the composition contains trivalent titanium at a concentration of 0.01 to 2 g/l, preferably from 0.2 to 0.6 g/l and has a pH of 2 to 7. Reducing means can be arranged to regenerate the trivalent titanium in the treatment solution continuously.

Process for the treatment of phosphatized metal surfaces with a

The invention relates to a process of phosphating surfaces of iron and of steel with manganese. The abovesaid process is characterized by the fact on the one hand, that it does not include a refining treatment preceding the proper phosphating, and on the other hand, that the alkali degreasing bath has a pH of 9 to 12 and includes in suspension bivalent manganese in orthophosphate form.

Processes of phosphating surfaces of iron and of steel with manganese

A treatment of iron or steel surfaces to give them enhanced anti-corrosive and paint-retaining characteristics comprises the application, by spraying, dipping or otherwise, of a composition in the form of a solution of phosphates which includes an accelerating agent represented by a quantity of tungstate ion and which has a pH value in the range 5.8 to 6.5, and preferably 6.0 to 6.4.

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Colombes, France

Victor Ken