The invention discloses phosphatizing liquid. The phosphatizing liquid comprises the following components in percentage by weight: 7 percent of starter liquid, 0.38 to 0.4 percent of neutralizer, 0.2 to 0.6 percent of accelerator and the balance of water, wherein the starter liquid comprises the following components in percentage by weight: 30 to 36 percent of 85 percent phosphoric acid, 16 to 20percent of 68 percent nitric acid, 15.6 to 18.4 percent of 99.7 percent zinc oxide, 0.4 to 0.6 percent of citric acid, 0.4 percent of sodium fluoride, 0.6 to 1 percent of nickel nitrate, 0.16 to 0.24percent of ferric nitrate, 0.004 to 0.01 percent of copper nitrate and the balance of water.

Phosphatizing liquid and preparation method thereof

The invention discloses a high-phosphorus chemical nickel-plating concentrated solution and a plating process The concentrated solution comprises three parts, namely, a solution A, a solution B and a solution C, wherein the solution A is a nickel sulfate solution; the solution B is obtained by mixing a first buffer agent, a first complexing agent, sodium hypophosphite, a stabilizer, polyethylene glycol 6000, a brightener and deionized water at room temperature; the solution C is obtained by mixing a second buffer agent, a second complexing agent, a reducing agent, a stabilizer, polyethylene glycol 6000, an accelerator, a brightener, a pH adjusting agent, and deionized water at room temperature; the solution A and the solution B are used for grooving and the solution A and the solution C are used for replenishing The solution A, the solution B and dilution water are mixed in percentage by volume so as to form the chemical nickel-plating solution of which the pH value is 47-52 During the plating, when the content of nickel in the nickel-plating solution is less than 40g/L, the solution A and the solution C are replenished When nickel is plated by virtue of the nickel-plating concentrated solution, the deposition rate of a plated workpiece is high, the stability is good, the hardness and the wear resistance of the coating are relatively high and the high-phosphorus chemical nickel-plating concentrated solution is suitable for application in brazing, spot welding and depositing a thick coating

High-phosphorus chemical nickel-plating concentrated solution and plating process

Belonging to the technical field of surface treatment technologies, the invention provides a high hydrogen sulfide resistant and high wear-resistant environment-friendly type Ni-P-W-Mo quaternary alloy plating solution. Per liter of the plating solution comprises: 28-35g of nickel sulfate or nickel chloride, 35-44g of sodium hypophosphite, 11-15g of sodium acetate, 8-9ml of lactic acid, 12-15g of DL malic acid, 5-7g of succinic acid, 0.2-0.4ml of a brightening agent, 0.1-0.2ml of a complexing agent, 0.08-0.12ml of a stabilizer, and the balance water. The plating solution realizes chemical plating of W-Mo quaternary alloy, an also, except a main salt, the used materials all adopt food additives as attached salts. And there exists no heavy metal ion environmental pollution.

Environment-friendly type high hydrogen sulfide resistant and high wear-resistant Ni-P-W-Mo quaternary alloy plating solution and its preparation method

The invention relates to a chemical plating solution of an oilfield drilling tool and an anti-corrosion protection method of the drilling tool. The anti-corrosion protection method comprises the steps of: processing the inner wall of a drill stem by steps of washing, alkali washing, washing, pickling, washing, activating, washing and chemically plating sequentially, wherein the chemical plating solution is prepared from the following components in parts by weight: 1000 parts of water, 15-80 parts of nickel sulfate, 5-40 parts of sodium hypophosphite, 3-20 parts of complexing agent, 0.0005-0.005 part of thiourea, and 1-15 parts of assistant; the complexing agent adopts elhylene diamine tetraacetic acid or lactic acid; the assistant is citric acid, sodium citrate, succinic acid, sodium acetate, propionic acid or copper sulfate; the temperature of the chemical plating solution in the plating process is kept at 65-95 DEG C; the pH value of the chemical plating solution is adjusted to 2.5-6.0 through the assistant; the plating time is 1-3 hours; the residual chemical plating solution is extracted after plating; and the inner wall of the drill stem is washed by using running water. By adopting the chemical plating solution and the anti-corrosion protection method of the oilfield drilling tool, the decay resistance of the drilling tool can be greatly improved; and the service life is prolonged.

Chemical plating solution of oilfield drilling tool and anti-corrosion protection method of drilling tool

The invention discloses a nickel-phosphorus/nano V8C7 composite plating liquid The plating liquid comprises the following components: 120-180 g/L of nickel sulfate, 10-30 g/L of nickel chloride, 30-50 g/L of sodium hypophosphite, 10-25 g/L of boric acid, 02-2 g/L of a complexing agent, 01-05 g/L of a brightening agent and 5-20 g/L of nano V8C7 Compared with the prior art, by adopting the composite plating liquid disclosed by the invention, a composite plate taking nickel-phosphorus amorphous alloy as a basal body and the nano V8C7 as a second phase can be prepared, and the surface is free of microcracks The nickel-phosphorus/nano V8C7 composite plating liquid is high in abrasion resistance and corrosion resistance The composite plating liquid is simple in composition, little in damage of reagents to the environment, stable in technology, simple in operation and high in current efficiency

Nickel-phosphorus/nano V8C7 composite plating liquid

The invention provides a formulation of medium-temperature acidic electroless nickel-phosphorus alloy, which is characterized in that the formulation is as follows: 25 to 30 grams of nickel sulfate per liter, 25 to 35 grams of sodium hypophosphite per liter, 12 to 18 grams of sodium acetate per liter, 05-13 milligrams of thiourea per liter, 7 to 13 milliliters of lactic acid per liter, 7 to 13 milliliters of acetic acid per liter, 4-10 grams of organic acid per liter, 5-16 milligrams of potassium iodide or potassium iodate per liter, and the loadage is between 05 and 15 dm /L The invention has the advantages that: the formulation improves the stability of a plating solution, obviously improves plating rate, has good corrosion resistance and the comprehensive properties of plating; the stability of the plating solution can reach over 1800 s; the stability of periodic experiments is more than ten periods; the corrosion resistance of the plating reaches over 130 s; and the hardness of the plating reaches 480 HV

Middle-temperature acidic electroless nickel plating-phosphor alloy formula

The invention relates to a formulation of an intermediate-temperature acidic nanometer chemical composition plating Ni-P-ZrO2 which is characterized by comprising the formulation as follows: (1) formation of base plating solution comprising: 25-30g/L of nickel sulfate, 25-35g/L of sodium hypophosphite, 12-18g/L of Sodium acetate, 0.5-1.3MG/L of thiourea, 15-25ml/L of lactic acid, 15-25ml/L of glacial acetic acid and 5-10g/L of organic acid; (2) additive formulation of periodic test: the adding weight ratio of sodium hypophosphite to the nickel sulfate is 1.1-1.3, wherein the concentration of nickel ion in the plating solution is tested in every 60 minutes, the concentrated solution is added according to the consumption of the nickel ion, wherein the addition of the nanometer ZrO2 granule is 10-25 percent of the original use amount, the plating temperature is 70-75 DEG C and the PH value ranges from 4.5 to 5.2. The invention has the advantages of high plating speed that can be comparedwith a high-temperature plating solution system, favorable stability of the plating solution above 1200s and a service life of the plating solution longer than 10 cycles, wherein the stability constant is above 95 percent.

Wanfeng Lin

Papers

Middle-temperature acidic electroless nickel plating-phosphor alloy formula

Formulation of intermediate-temperature acidic nanometer chemical composition plating Ni-P-ZrO2