Elektro-Brite Gmbh

Elisha Holding LLC

Raschig Ag

Elektro-Brite Gmbh & Co. Kg.

Walter Hillebrand Gmbh & Co. Galvanotechnik

Klaus-Peter Klos

Karl-Heinz Lindemann

Hermann Donsbach

Werner Kurze

Willi Birnstiel

Ernst-Walter Hillebrand

The disclosure relates to a corrosion resistant article comprising a metal body and a protective coating applied on at least one surface of said metal body, said protective coating comprising: (a) a zinc layer comprising metallic zinc; (b) a silicate layer comprising at least one silicate; and (c) a lubricant layer comprising at least one lubricant such as, for example, polyethylene wax. In particular, the disclosure relates to a corrosion resistant bolt and/or nut having a protective coating for use in motor vehicles. The protective coating is substantially free of chromates and phosphates and, hence, environmentally acceptable. The article has an excellent coefficient of friction, temperature resistance and anti-corrosion properties.

Corrosion resistant article and method of production thereof

Novel Polyalkylenglycol naphthyl-3-sulfopropyl diethers and salts thereof of the formula ##STR1## (R.sub.1 -R.sub.3 =H, C.sub.p H.sub.2p--1 ; p=l--4, A=(PO).sub.m --(EO).sub.n --, (EO).sub.n --(PO).sub.m,--(EO).sub.n EO=ethylenoxide residue, PO=propylenoxide residue, m=0-15, n-1-40, A=H, alkali metal, earth alkali metal, NR.sub.5 R.sub.6 R.sub.7 R.sub.8 wherein R.sub.5 -R.sub.8 =H, C.sub.1 -C.sub.4 --alkyl, aryl, aralkyl) are prepared by reacting the corresponding polyalkylene glycol naphthyl either with propane-1.3-sultone. The compounds are surfactants in particular in electroplating baths for precipitation Zn, Sn, Cu, Ag, Ni and alloys thereof.

Polyalkylene glycol naphthyl-3-sulfopropyl diether compounds and their

Bright electrodeposits of zinc/iron alloys onto iron of good ductility and adhesion are obtained at low electroplating voltage and high current yield by using a bath containing zinc sulfate, ferrous sulfate, conductive salt, citric acid and alkali metal acetate and, as additional ingredients, saccharin, a naphthalene mono-, -di- or -trisulfonate or a condensation product thereof with formaldehyde and/or an organic complexing agent for iron and further one or more compounds selected from the group consisting of alkali metal cumene sulfonate, alkali metal benzoate, collagen hydrolyzate having a mean molecular weight of from 500 to 2000 and a reducing agent for ferric irons selected from the group consisting of alkali metal bisulfite, alkali metal dithionite and hydroxy ammonium chloride.

Acidic sulfate containing bath for the electrodeposition of zinc/iron

Bright electrodeposits of zinc/iron alloys of good ductility and adhesion are obtained at low electroplating voltage and high current yield by using a bath containing zinc chloride, ferrous chloride, conductive salt and, as additional ingredients, saccharin, a dextrin of molecular weight 2,000 to 30,000 and, optionally, a reducing agent for ferric ions such as alkali metal bisulfite, alkali metal dithionite and hydroxyl ammonium chloride at a p.sub.H 1-3.5.

Acidic chloride containing bath for the electrodeposition of zinc/iron

Bright electrodeposits of zinc/nickel alloys onto iron of fine crystalline structure are obtained by using an acidic bath containing the sulfates of zinc and nickel, alkali metal acetate and brightening agents, the brightening agents being (1) citric acid, (2) hexin-3-diol-2,5 and (3) naphthalene sulfonic acid having 1 to 3 sulfo groups which is optionally substituted by one or two C.sub.1 -C.sub.4 -alkyl groups and halogen atoms, respectively or a condensation product thereof with formaldehyde.

Sulfate containing bath for the electrodeposition of zinc/nickel alloys

An aqueous acidic trivalent chromium and fluoride containing coating (passivating) solution for zinc, zinc alloy and cadmium surfaces contains one or more complex compounds of the formula

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Trebur, Germany

Klaus-Peter Klos