48results about How to "Avoid miss plating" patented technology

The invention relates to electrolytic plating assistant for hot dip galvanizing of a steel wire. Electrolytic plating assistant comprises the following components: 30-220 g / L of zinc chloride, 0-150 g / L of potassium chloride, 0-150 g / L of sodium chloride, 2-90 g / L of ammonium chloride, 0-100 g / L of boric acid, 0-70 g / L of acetic acid, 1-25 g / L of sodium fluoride, 2-50 g / L of cerium chloride, 0-50g / L of potassium fluozirconate, 0-50 g / L of methanol, 0.5-20 g / L of hydrogen peroxide and the balance of water. The electrolytic plating assisting method comprises the following steps: washing with alkali, removing oil, washing with water, washing with acid to remove rust, washing with water, activating with weak acid, electrolyzing to assist plating, drying, and purifying the electrolytic plating assistant. The method can reduce the generation of AlCl3, prevent skip plating and reduce the generation of smoke dust. The electrolytic plating assistant has the characteristic of relatively high melting point, and thus, can increase the drying temperature and shorten the drying time. The dried plating assistant has the characteristics of low brittleness, high compatibility with electrogalvanizing, and low tendency to shedding.

The invention discloses a plating assistant agent additive for preventing plating leakage of steel wire hot galvanizing which comprises the following components in percentage by weight: 20-25% of fatty alcohol-polyoxyethylene ether, 20-26% of dodecyl phenyl polyoxyethyleneether, 8-14% of polyoxyethylene octylphenol ether, 3-6% of triethanolamine, 0.8-1.5% of carbamide and 30-36% of methyl alcohol. The method comprises the following steps: weighing the raw materials according to the proportioning of the additive, mixing and stirring the raw materials evenly to form the additive of the invention, adding the stock solution of the plating assistant agent additive of the invention into a slot according to a proportion that the amount of the added stock solution of the plating assistant agent additive accounts for 0.1-0.2% of the plating assistant agent bath solution, stirring evenly, and being able to use at the temperature of 70-75 DEG C. By adding the additive of the invention into the plating assistant agent, the wettability and the infiltrative of the plating assistant agent can be effectively enhanced, the plating effect on the surface of the steel wire is improved, and the plating leakage of the steel wire zinc plating is avoided.

The invention relates to a preparation method for a plating assistant agent which prevents the hot-galvanized leakage on the surface of a steel wire. The method includes: dipping the steel wire afterbeing washed by muriatic acid and bathed into a water solvent slot; fishing out the slag of zinc from the bottom part of a steel wire hot-galvanized smelted zinc boiler; putting into an ammonium chloride water solvent slot after being cooled; heating the water solvent containing the ammonium chloride and maintaining the temperature between 70 to 75 DEG C; wherein, the initial content of the ammonium chloride is 30 to 45g / L; the initial pH value is 2 to 3; a method for utilizing the muriatic acid brought in by the steel wire after being washed by the muriatic acid to generate a chemical reaction with the slag of zinc to generate zinc chloride is used to form the mixed water solvent of the zinc chloride and the ammonium chloride which meets the quality demand for producing a galvanized layerby the hot-galvanized steel wire. The method has the advantages of simple technique, low production cost, stable quality, being capable of industrial production, etc. The consumption for the ammoniumchloride for producing each ton of steel wire can be saved by 40 to 50 percent; the generating amount of the slag of zinc (FeZn13) is reduced; the zinc consumption is reduced; the zinc can be saved by 10 to 15 percent.

The invention relates to the plating field and discloses a pickling system and a pickling method. The pickling system comprises a pickling bath group (1) which comprises a plurality of pickling baths (101) that are arranged between a feeding end and a discharging end in the length direction of the pickling system, and parts to be pickled can be sequentially pickled in the pickling baths (101). Through step-by-step pickling of the parts to be pickled in the pickling baths, not only can the pickling quality be improved and the parts to be pickled be prevented from mis-plating, but also a pickling agent in one of the pickling baths can be transferred to the upper stage step by step, a pickling solution, of which the concentration is reduced and impurities are increased, in the first-stage pickling bath can be discharged and disposed, the dilution speed of the pickling agent in the multiple stages of the pickling baths is reduced, accordingly, the utilization ratio of the pickling agent is improved, and the production cost is lowered.

The invention discloses a corrosion-resistant Zn-Al-Mg rare earth alloy coating, a preparation and a hot dipping method thereof. The corrosion-resistant Zn-Al-Mg rare earth alloy coating comprises the following raw materials by ratio: 3-9wt% of Al, 0.03-0.09wt% of Mg, 0.01-0.15wt% of rare earth and the balance of zinc, wherein rare earth is lanthanum, cerium or praseodymium. Various raw materials are mixed and prepared through an alloy fusion step to fusion alloy, the plating liquid has good fluidity and has good wellability on steel base; steel with pretreated surface enables hot dipping on the prepared fusion alloy, the corrosion-resistant Zn-Al-Mg rare earth alloy coating is plated on the surface, the coating has smooth surface and has good anticorrosion performance.

The present invention relates to the related field of nickel plating methods, and more particularly, the present invention provides a nickel plating process on the surface of an aluminum alloy. A first aspect of the present invention provides a nickel plating process on the surface of an aluminum alloy, which sequentially includes the steps of: oil removal, silicon removal, first zinc-nickel deposition, second zinc-nickel deposition, alkaline nickel plating, acid nickel plating, Sealing and drying. The present invention adopts the method of twice immersing zinc nickel, then performing alkaline acid nickel plating, and finally performing sealing and drying to realize the nickel plating on the surface of the aluminum alloy. The bonding force has a good protective effect on zinc-nickel plating. The reagents used in placement can cause corrosion to the plating layer. At the same time, it can prevent small sand holes from leaking plating, and can also prevent local plating from falling off. The specific acid nickel plating solution is used to reduce the magnetic field. Conductivity, improve the flatness and smoothness of the coating.