Patent On Cold Phosphating Process

The present invention relates to a composition and process for metal finishing involving the formation of zinc phosphate coatings of desired morphology on a ferrous surface The inclusion of a hydroxylamine agent in the phosphating bath expands the range of zinc concentrations over which the desired coating morphology is obtained Zinc and
This invention provides a phosphating process that can form a film suitable for a cold forging foundation within 60 seconds and preferably 30 seconds or less
A process for phosphating a metal surface to be electrocoated, which comprises treating the metal surface with an acidic phosphating solution comprising a zinc compound in a concentration of 05 to 15 g/l as zinc ion, a phosphate in a concentration of 5 to 30 g/l as phosphate ion and a nitrite in a concentration of 001 to 02 g/l as nitrite
9 1934 Use of phosphate coating for cold working operations for metals 22 10 1937 Spray phosphating Œ phospating time: 60-90 seconds 23 11 1940 Development of non-coating phosphate process …
The oil-removing, rust-removing and phosphating treatment process disclosed by the invention is simple and convenient to operate; and by adopting the oil-removing, rust-removing and phosphating treatment process, oil stains and rusty stains can be effectively cleaned, a workpiece can be protected simultaneously, the workpiece can be prevented from being corroded, rendering can be also
31/07/1990 · The present invention relates to a process for phosphating metal surfaces, and more particularly to zinc-calcium phosphating surfaces of iron, zinc, aluminum, and their alloys as a pretreatment before cold working
Phosphating The process of phosphating aluminum and steel parts is typically listed as a conversion coating because the process involves metal removal as part of the reaction
The problems due to overheating of the phosphating bath [Metal Finishing (USA), 93(1) (1995) 30-31] and difficulty in maintaining heating coils could be avoided with the use of cold phosphating However, cold phosphating requires more processing time to achieve the desired amount of phosphate coating weight and in a continuous process line the processing time has to be adjusted accordingly
Phosphating is the process of converting a steel surface to iron phosphate This is mostly used as a pretreatment method in conjunction with another method of corrosion protection A layer of phosphate coating typically includes iron, zinc or manganese crystals
Phosphate coatings are used on steel parts for corrosion resistance, Process The application of phosphate coatings makes use of phosphoric acid and takes advantage of the low solubility of phosphates in medium or high pH solutions to form a lubrication layer in cold and hot forging
14/02/2014 · In this video we (AMAN CHEMICALS INDIA) have shown the step by step procedure of zinc phosphating process it will help many industry to get aware about the right process of zinc phosphating
associated with the phosphating process and the costs associated with these processes For example, US Patent No 4,659,395 to Sugama et al, provides a process for applying a zinc phosphating solution which does not require subsequent rinsing However, the prior art of Sugama et al does require a coating on said TMT rebar or cold rolled
Phosphating process Abstract Water-soluble lignosulphonate salts when present in an acid metal phosphating solution modify the physical form of sludge produced therein when the solution is used to treat a metal substrate
A process according to claim 1 wherein there is present 5 to 50 parts of water soluble polymer per million parts of the phosphate solution 3 A process according to claim 1 wherein the molecular weight of the polymer is in the range 1,000 to 50,000
08/02/2010 · With this process it is possible to complete the stone phosphating with mechanical polishing, avoiding the necessity to pre-clean the wire with phosporic or chloridic acids, both of which are
•Phosphating is a surface treatment process by which the virgin steel surface is converted to metallic phosphate & is widely used for preparing metal –Cold swilling –Hot phosphating –Cold swilling –Sealing/Passivation PHOSPHATING EQUIPMENT ALKALI DEGREASING
The aim of the present work is to control the iron concentration in the phosphating bath in order to improve the quality and adhesive properties of zinc phosphating coating on steel sheets that
25/08/2015 · Abstract In the past 10 years, the cold spray process has gained in maturity leading to a significant increase in the patents released on system innovation and process implementation in number of industrial sectors
The problems due to overheating of the phosphating bath [Metal Finishing (USA), 93(1) (1995) 30-31] and difficulty in maintaining heating coils could be avoided with the use of cold phosphating However, cold phosphating requires more processing time to achieve the desired amount of phosphate coating weight and in a continuous process line the processing time has to be adjusted accordingly
04/08/2011 · A process for the production of titanium-IV-phosphate includes introducing a titanium-oxygen compound into aqueous phosphoric acid and treating the resulting suspension in a temperature range of more than 50° C to 150° C until complete dissolution of the titanium-oxygen compound
The process was first used on a large scale in the manufacture of firearms for the United States military during World War II The earliest work on phosphating processes was developed by British inventors William Alexander Ross, British patent 3119, in 1869, and by Thomas Watts Coslett, British patent …
Title: Two-step zinc phosphating process Abstract: Described are methods for treating a multi-metal assembly The assembly has a first portion that includes an aluminum substrate and a second portion that includes a non-aluminum metal substrate The methods include treating the multi-metal assembly
Phosphating is a conversion coating process that utilizes diluted phosphoric-acid or phosphate-salts aqueous solution in order to convert the surface of a metal in an insoluble and adherent phosphate coating through electrochemical reactions The obtained phosphate coating provides the metal surface with useful properties
08/02/2010 · With this process it is possible to complete the stone phosphating with mechanical polishing, avoiding the necessity to pre-clean the wire with …
The phosphating solution consists essentially of phosphoric acid primary phosphate of iron, zinc or manganese and some oxidizing agentsOf the Three coatings zinc phosphate is by far the best suited for cold deformation of steel including wire and tube drawings
A process for the preparation of boron phosphate, useful for humidity sensing which comprises mixing thoroughly boric acid and its salt and orthophosphoric acid and its salt in dry organic solvent, for a period ranging between half an hour to 8 hours, increasing the temperature to 100°C at the heating rate in the range of 1°C and 10°C per minute and aging at 100°C for a period ranging from
Phosphating or phosphate conversion coating is a manufacturing process in which an acidic bath solution reacts with the metal part or weldment and combines with or causes a stone conversion that transforms the surface of the metal part into a protective layer, …
17/12/2015 · Basically, patents are of two types – product patent and process patent Product patent and process patent A patent is defined as a statutory privilege granted by the government to inventors, and to other persons deriving their rights from the inventor, for fixed years, to exclude other persons from manufacturing, using or selling a patented product or process
The first financial patent was granted on March 19, 1799, to Jacob Perkins of Massachusetts for an invention for "Detecting Counterfeit Notes" All details of Perkins' invention, which presumably was a device or process in the printing art, were lost in the great Patent Office fire of 1836 Its existence is only known from other sources
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