50results about How to "Phosphating time is short" patented technology

The invention provides a normal-temperature sludgeless fast phosphating liquid and a preparation method thereof. The normal-temperature sludgeless fast phosphating liquid is prepared from the following raw materials by mass percent: 10-20% of phosphoric acid, 6-10% of zinc oxide, 20-25% of zinc nitrate, 1-5% of sodium metanitrobenzene sulfonate, 0.5-2% of sodium citrate, 1-4% of ethylenediamine tetraacetic acid (EDTA), and the balance of water. The phosphating film copper sulfate droplet test time of the phosphating liquid disclosed by the invention can be up to 30 seconds, the neutral salt spray test time can be up to 4 hours, the adhesive force of a paint film can be up to 0 grade, meanwhile, the phosphating time is short, the work efficiency is greatly improved, the operating temperature is low, a phosphating sediment is basically not generated, the cleaning cycle is greatly prolonged, the solid waste treatment cost is reduced, and energy consumption does not need to be consumed.

The present invention discloses a kind of low temperature fast phosphatizing solution for treating the welded area in drawn high carbon coil rod and its phosphatizing process. The low temperature fast phosphatizing solution of the present invention has lubrication on the welded area to avoid crack and breaking. The low temperature fast phosphatizing solution has hydroxylamine sulfate to replace traditional harmful NaNO2, and possesses environment friendship, high stability and long service period.

The invention relates to the field of a phosphate solution formulation. The solution is especially suitable for the phosphating process before hot stamping of an ultra-high-strength steel blank, and the surface treatment of the ultra-high-strength steel blank needs to be carried out by a composite phosphate solution. , to obtain a layer of high-temperature-resistant composite lithium iron phosphate-calcium sulfate film to improve the life of the mold. Given the chemical composition ratio according to the invention, configure a composite lithium ferrous phosphate-calcium sulfate surface treatment solution suitable for hot stamping of ultra-high-strength steel sheets: first pass iron oxide Fe2O3, lithium hydroxide LiOH H2O, hydroxide Lithium LiOH H2O, ammonium dihydrogen phosphate (NH4) 2HPO4, carbon source C to synthesize lithium iron phosphate, followed by calcium sulfate CaSO4 ultrafine powder, lithium iron phosphate ultrafine powder LiFePO4, phosphoric acid H3PO4, and distilled water H2O, according to its The mass ratio is: (40‑60): (10‑30): (5‑10): (808‑912). Put the ultra-high-strength steel blank to be treated into the phosphating solution at 55°-60°C, and the blank can obtain a dark gray phosphating film. Finally, the blank is heated to remove hydrogen to reduce the harm of hydrogen embrittlement. The saponification process is carried out to further enhance the lubrication between the hot stamping sheet and the mold.

The invention discloses a composition for steel phosphating and a preparation method thereof. The composition is composed of the following components in parts by mass: 2-6 parts of sodium nitrate, 2-4 parts of sodium citrate, 15-25 parts of iron manganese dihydrogen phosphate, 5-10 parts of magnesium oxide, 10-20 parts of nickel nitrate, 2-5 parts of copper sulfate, 1-3 parts of sulfosalicylic acid, 2-5 parts of polyethyleneglycol and 500-900 parts of deionized water. The preparation method comprises the following steps: a. weighing the components according to parts by mass; b. adding the sodium citrate, sulfosalicylic acid and polyethyleneglycol into another deionized water; and c. uniformly mixing the solutions obtained in the step a and step b. The composition for steel phosphating can complete phosphating within 8-10 minutes, and has the advantages of high phosphating speed and short required lime for phosphating; and the surface of the phosphated steel has bright color.