Abstract: The invention is an aqueous autodeposition coating composition that produces a film that has a better adherence and corrosion resistance than the films formed by the prior-art coating compositions, but which does so without a rinse treatment (for example, a chromium containing solution, rinse) prior to film curing. The aqueous autodeposition coating composition has a pH of 1.6 to 5.0 and contains(i) water-dispersible or water-soluble organic film-forming resin,(ii) at least one of fluoride ions or fluoride ions and complex fluoride ions,(iii) hexavalent chromium ion or hexavalent chromium ion+trivalent chromium ion, and(iv) tungstate ion and/or molybdate ion.

Abstract: A chromating composition including hexavalent and trivalent chromium, phosphate ions, silica, and a silane coupling agent and with ratios among its components within certain specified ranges produces a protective layer on the surface of zinc coated steel treated with the composition that has an excellent alkali resistance, corrosion resistance, coatability, and welding tolerance.

Abstract: An .alpha.-cyanoacrylate adhesive composition of matter consisting essentially of .alpha.-cyanoacrylate, fumed silica treated on the surface with dimethyldichlorosilane, and trialkyl borate, the trialkyl borate being expressed by the general formula B(OR).sub.3 wherein R represents any alkyl groups having carbon numbers 1 through 18. Although to this composition of matter, improved thixotropy high in stability are obtained and significant improvements are effected not only in the ineffectiveness of workability but in the restrictions on the range of work which were both problems of conventional adhesives.