Abstract: Improved autodeposited coatings on metallic surfaces are formed by contacting the metallic surfaces with an autodepositing composition comprising an acidic aqueous coating solution containing dispersed solid resin particles of either an internally stabilized or externally stabilized vinylidene chloride polymer, an exemplary internally stabilized polymer being prepared from vinylidene chloride and a monomeric surfactant which includes an inorganic ionizable group, and an exemplary externally stabilized polymer being prepared from vinylidene chloride and a reactive comonomer, the resulting resin particles having surfactant adsorbed thereon, said autodeposited coatings having extremely good corrosion resistant properties without treatment with a reaction rinse such as a chromium rinse.

Abstract: Improved autodeposited coatings on metallic surfaces are formed by contacting the metallic surfaces with an autodepositing composition comprising an acidic aqueous coating solution containing dispersed solid resin particles or either an internally stabilized or externally stabilized vinylidene chloride polymer, an exemplary internally stabilized polymer being prepared from vinylidene chloride and a monomeric surfactant which includes an inorganic ionizable group, and an exemplary externally stabilized polymer being prepared from vinylidene chloride and a reactive comonomer, the resulting resin particles having surfactant adsorbed thereon, said autodeposited coatings having extremely good corrosion resistant properties without treatment with a reaction rinse such as a chromium rinse.

Abstract: Improved autodeposited coatings on metallic surfaces are formed by contacting the metallic surfaces with an autodepositing composition comprising an acidic aqueous coating solution containing dispersed solid resin particles of either an internally stablilized or externally stabilized vinylidene chloride polymer, an exemplary internally stabilized polymer being prepared from vinylidene chloride and a monomeric surfactant which includes an inorganic ionizable group, and an exemplary externally stabilized polymer being prepared from vinylidene chloride and a reactive comonomer, the resulting resin particles having surfactant adsorbed thereon, said autodeposited coatings having extremely good corrosion resistant properties without treatment with a reaction rinse such as a chromium rinse.

Abstract: Improved autodeposited coatings on metallic surfaces are formed by contacting the metallic surfaces with an autodepositing composition comprising an acidic aqueous coating solution containing dispersed solid resin particles of either an internally stabilized or externally stabilized vinylidene chloride polymer, an exemplary internally stabilized polymer being prepared from vinylidene chloride and a monomeric surfactant which includes an inorganic ionizable group, and an exemplary externally stabilized polymer being prepared from vinylidene chloride and a reactive comonomer, the resulting resin particles having surfactant adsorbed thereon, said autodeposited coatings having extremely good corrosion resistant properties without treatment with a reaction rinse such as a chromium rinse.

Abstract: A process forming an organic coating, such as an autodeposited coating, on a plurality of small metallic articles by contacting the articles with a liquid coating composition containing an organic film-forming material comprising:(A) providing a plurality of said articles, with at least some of the articles being in contact with at least one other of said articles;(B) immersing the articles into a bath of said composition under conditions such that said articles are not in conttact with another article in said composition;(C) maintaining said articles in separated form in said composition for a period of time sufficiently long for the entirety of the surfaces of said articles to be coated with said composition; and(D) collecting the coated articles in the bath in a form in which at least some of the coated articles are in contact with another of said coated articles;wherein the coating composition is capable of forming on a steel panel immersed therein a coating having a wet strength such that its rinse resis

Abstract: In a process wherein a resinous coating is formed on a metallic surface by immersing the surface in an acidic aqueous coating composition containing dispersed particles of resin, wherein said composition forms on said surface a resinous coating which increases in thickness the longer the surface is immersed in the composition and wherein the resinous coating is contacted with an aqueous solution containing Cr to improve properties of the resinous coating, the improvement comprising contacting said resinous coating with an acidic aqueous solution prepared by combining a hexavalent Cr-containing compound, an aqueous mixture of hexavalent chromium/reduced chromium, and an acid or a soluble salt thereof.

Abstract: Iodine and certain iodine compounds are used as activators (oxidizers) in otherwise conventional autodeposition coating compositions, resulting in improved coating quality. When at least one unsaturated recurring unit polymer is comprised within the latex, corrosion resistance of the coating is also improved.

Abstract: Autodeposition unsaturated latex baths which are hydrogen peroxide-free (using iodine or certain iodine salts or free acids as the oxidizer) and which are hydrofluoric acid-free (using, preferably, acetic acid) afford coatings which can incorporate silicate-containing pigments, fillers, and other ingredients.

Abstract: An autodepositing coating composition of the ferric iron-containing type wherein ferrous iron tends to build up in concentration in the composition and affect adversely the coating capabilities of the composition as it is used continuously to autodeposit coatings on iron-containing surfaces, the improvement comprising adding to said composition, in an amount effective to decrease the amount of ferrous iron which tends to adversely affect the coating capabilities of the composition, a carboxylic acid which is effective in forming a complex with said ferrous iron.

Abstract: Method and composition for applying a coating to a metallic surface, the surface being immersed in an acidic aqueous coating composition comprising dispersed solid particles of an organic polymeric resinous coating-forming material and an oxidizing agent, wherein the weight or thickness of the coating formed on the surface is a function of the time the surface is immersed in the composition.

Abstract: An aqueous coating composition containing a monomer which is capable of polymerizing in the presence of a metallic substrate in contact with the composition to form a polymer which has a multiplicity of groups capable of ionizing to form negatively charged groups on the polymer chain. Also, an autodepositing composition having included therein a monomeric constituent, that is, a material capable of being polymerized, for forming an organic coating on a metallic substrate.

Abstract: An outodepositing coating process wherein a coating bath containing an acidic aqueous coating composition comprising as essential ingredients: (1) an acid; (2) an oxidizing agent; and (3) an aqueous dispersion of coating forming resin particles and surfactant, which surfactant is subject to being slowly altered by the acidic oxidizing environment in the metal coating bath resulting in the buildup of reaction products in the bath, which bath is maintained in continuous coating forming operability by replenishing in a manner which prevents the deterioration of the coating quality of the bath. The coating composition and replenishing composition may also contain as an optional ingredient an aqueous dispersion of pigment and surfactant and may also contain non-essential ingredients, which non-essential ingredients may increase in concentration as the bath is operated until a deleterious effect is asserted on the coating formation.

Abstract: In a process wherein an organic coating is formed on a metallic surface by immersing the surface in an acidic aqueous coating composition containing dispersed particles of an organic coating-forming material, wherein said composition forms on said surface an organic coating which increases in thickness the longer the surface is immersed in the composition and wherein the coating on said surface tends to crack, the improvement comprising maintaining a non-oxidizing atmosphere surrounding the metallic surface from the time it is removed from the coating composition until the coated metallic surface is heated to fuse the coating.

Abstract: In a process wherein an organic coating is formed on a metallic surface by immersing the surface in an acidic aqueous coating composition containing dispersed particles of an organic coating-forming material from which the particles are deposited on the metallic surface forming an organic coating which increases in thickness the longer the surface is immersed in the composition and wherein the temperature of the coating composition tends to rise with the result that the quality of coatings formed therefrom is affected adversely, particularly when coating worked or roughened metal surfaces, the improvement comprising maintaining the temperature of the coating composition at a temperature within the range over which the rate of change in the rate of film build is substantially constant thereby improving the quality of the coating formed by the deposition of coating-forming particles, including reducing or preventing the tendency of the composition to form coatings which contain pinholes and/or craters.

Abstract: A metallic substrate is pretreated with a composition containing an acid corrosion inhibitor prior to subjecting the substrate to an acidic aqueous autodepositing coating composition of the type which contains dissolved fluoride and ferric ions in order to improve the quality of the coating formed from said autodepositing composition by reducing or preventing the tendency of the composition to form coatings which contain pinholes or blisters on worked or roughened areas of the metallic surface.

Abstract: An autodepositing coating process wherein a coating bath containing an acidic aqueous coating composition comprising as essential ingredients: (1) an acid; (2) an oxidizing agent; and (3) an aqueous dispersion of coating forming resin particles and surfactant, which surfactant is subject to being slowly altered by the acidic oxidizing environment in the metal coating bath resulting in the buildup of reaction products in the bath, which bath is maintained in continuous coating forming operability by replenishing in a manner which prevents the deterioration of the coating quality of the bath. The coating composition and replenishing composition may also contain as an optional ingredient an aqueous dispersion of pigment and surfactant and may also contain non-essential ingredients, which non-essential ingredients may increase in concentration as the bath is operated until a deleterious effect is asserted on the coating formation.

Abstract: A resinous coated metal film is produced by depositing metal on a support to form thereon a metal film and forming on the thus deposited metal film an autodeposited resinous coating. In one embodiment, the autodeposited resinous coated metal film is formed by immersing a metallic substrate in a modified autodepositing composition, that is, an autodepositing composition modified by the addition thereto of dissolved metal which is more noble than the metallic substrate. In another embodiment, a metal film is preformed on a metallic substrate, and thereafter the metallic substrate, having thereon the metal film, is contacted with an autodepositing composition. The metal film having thereon the autodeposited coating can be separated from the metallic substrate.

Abstract: An acidic aqueous coating composition having dispersed therein solid resin particles and of the type which forms on a metallic surface immersed therein a resinous coating which increases in thickness or weight the longer the time the surface is immersed in said composition, said composition being characterized by having therein (A) particles of resin which are prepared by polymerizing (i) a conjugated diene, (ii) CH.sub.2 .dbd.CHR wherein R is an aryl or cyano group, (iii) a vinyl halide, and (iv) a monoethylenically unsaturated monomer having a functional group or (B) resin particles which are substantially chemically and physically homogeneous, and wherein said composition has little or no surfactant in the aqueous phase of the composition.

Abstract: In a process wherein a resinous coating is formed on a ferriferous surface by immersing the surface in an acidic aqueous coating composition prepared from dispersed particles of resin, HF and FeF.sub.3, wherein said composition forms on said surface a resinous coating which increases in thickness the longer the surface is immersed in the composition and wherein as the composition is used to coat additional surfaces, it begins to form thinner coatings or it destabilizes, the improvement comprising maintaining the effectiveness of said composition by adding thereto an oxidizing agent which is effective in oxidizing ferrous iron.

Abstract: An aqueous composition comprising resin and pigment for use in an acidic aqueous coating composition, wherein substantially all the resin is associated with pigment, such that when said coating composition is applied to a metallic surface a resinous coating having uniform color is formed; the acidic aqueous coating composition, having resin and pigment therein, is of the type which forms on a metallic surface immersed therein a resinous coating which increases in thickness or weight the longer the time the surface is contacted with the coating composition; aqueous resin/pigment concentrate for use in the coating composition is prepared by combining an aqueous dispersion of resin solids with an aqueous dispersion of pigment solids in a manner such that substantially all of the resin solids have substantially the same opportunity to associate with the pigment solids.