Henkel Corporation

Hooker Chemicals & Plastics Corporation

Duane C Steele

William C Strickland

The oil splitting properties of otherwise conventional alkaline cleaning solutions that comprise water, an alkaline builder, and a general surfactant component are substantially improved by adding a special, nonionic, surfactant component that has an HLB value in the range from 1 to 7.9 and is made up of molecules that contain at least two nitrogen atoms per molecule and have a chemical structure that can be made by sequential additions of ethylene oxide followed by propylene oxide, or of propylene oxide followed by ethylene oxide, to core molecules that are most preferably 1,2-diaminoethane but more generally may be any organic amine that contains at least two primary and/or secondary amino groups and contains not more than 22 carbon atoms.

Composition and process for cleaning metals

A process for forming a chromium/silica/phosphate protective conversion coating on a metal surface is improved by pretreating the surface with a composition comprising at least one of (i) H.sub.2 TiF.sub.6, (ii) H.sub.2 SiF.sub.6, and (iii) a derivative of poly{alkenylphenol} before applying the conversion coating. The process of the invention results in a protective base coating having superior adhesion to paint at a relatively high coating weight which is desirable for improved corrosion resistance. This process is especially useful in forming such protective conversion coatings on continuous cast aluminum surfaces.

Process for forming protective base coatings on metals

Described is a low temperature low foaming alkaline cleaner composition comprising:

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Sterling Heights, MI, United States of America

Duane C Steele