CN104233246A

CN104233246A - Normal-temperature brush-coating phosphatization technology for household appliances

Info

Publication number: CN104233246A
Application number: CN201310233546.7A
Authority: CN
Inventors: 钱永清
Original assignee: WUXI XISHAN DISTRICT EHU TOWN DANGKOU QINGDANG METAL PRODUCT FACTORY
Current assignee: WUXI XISHAN DISTRICT EHU TOWN DANGKOU QINGDANG METAL PRODUCT FACTORY
Priority date: 2013-06-13
Filing date: 2013-06-13
Publication date: 2014-12-24

Abstract

The invention discloses a normal-temperature brush-coating phosphatization technology for household appliances. A phosphating solution used in the technology comprises 44-48 g/L of phosphoric acid, 24-28 g/L of zinc dihydrogen phosphate, 10-12 g/L of zinc oxide, 16-20 g/L of monocalcium phosphate, 6-8 g/L of calcium oxide, 6-8 g/L of tartrate, 5-7 g/L of sodium citrate, 12-14 g/L of oxalic acid, 3-6 g/L of hydroxylammonium hydrogensulphate, 7-9 g/L of nickel fluoride, 6-8 g/L of nickel sulfate, 3-5 g/L of OP-10, 2-4 g/L of sodium dodecanesulphonate and the balance water. The phosphatization technology comprises the following steps: 1) oil removing by the use of an organic solvent; 2) oil removing by the use of alkali lye; and 3) phosphatization: the above ingredients are used to prepare the phosphating solution; an acid-resistant brush is used to directly brush the phosphating solution uniformly on household appliance components to form a layer of phosphating solution film; and drying is carried out.

Description

A kind of household electrical appliance normal temperature Phosphating technique

Technical field

The present invention relates to technical field of surface, particularly relate to a kind of household electrical appliance normal temperature Phosphating technique.

Background technology

Bonderizing is one of ferrous metal method of chemical protection; along with developing rapidly of household electrical appliance; phosphating process is able to widespread use, but the bonderizing temperature of original Phosphating Solution is generally middle temperature more than 35 DEG C, and due to Phosphating Solution be acidic medium; at temperature more than middle temperature; very strong corrosive nature is had to phosphating equipment and heating installation, generally in two years just must more exchange device, simultaneously because needs are heated; energy consumption is large, is unfavorable for save energy.

A kind of phosphate solution used for phosphorization by dipping is disclosed in Chinese patent CN1032963A, containing zine ion 1-3 grams per liter in this solution, calcium ion 1.0-4.5 grams per liter, phosphate anion 21-32 grams per liter, m-nitrobenzene sodium sulfonate 0.1-3 grams per liter, chloranion 0.3-10 grams per liter, nitrate ion 0-15 grams per liter, nickel ion 0.1-0.3 grams per liter, disodium ethylene diamine tetraacetate 0.08-0.15 grams per liter, mn ion 0-0.8 grams per liter, wherein zinc, the ratio of calcium ion is 1: 1-1.5, zinc, the ratio of phosphate anion is 1: 7-19, m-nitrobenzene sodium sulfonate is 1: 1-3.5 with the ratio of chloranion, its feature, that filmogen is based on calcium zinc orthophosphate activated by thallium, adopt m-nitrobenzene sodium sulfonate, chlorate anions, nitrate ion is as associating promotor, other ion is as additive, the weak point of this solution is when adopting m-nitrobenzene sodium sulfonate and nitrate ion conbined usage, the concentration of m-nitrobenzene sodium sulfonate can make solution become tawny when controlling bad, when using sodium chlorate to do promotor, the concentration of sodium chlorate is wayward, solution can be made time excessive poisoning, cause the passivation of steel surface portion, this brings unfavorable factor to the formation of phosphatize phosphate coat, and this Phosphating Solution need to be heated in parkerizing process in temperature 58 DEG C of ability phosphatizations, have very strong corrosive nature to phosphating equipment and heating installation, and energy consumption is large, body refuse is many.

One " Phosphating Solution and preparation method thereof " is disclosed in Chinese patent CN1037936A, be made up of pickle solution and Phosphating Solution two portions, the percentage component of pickle solution is phosphoric acid 5-50%, thiocarbamide 0.005-0.015%, sodium laurylsulfonate 0.05-0.15%, peregal 0.05-0.15%, hexadecyl Trimethylamine 99 0.05-0.15%, citric acid 1-10%, water 93.145-39.535%; The percentage component of Phosphating Solution is nitrocalcite 5-15%, zinc phosphate 5-15%, nickelous nitrate 0.15-0.25%, Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES 0.045-0.55%, nitric acid tin 0.045-0.055%, citric acid 0.15-0.25%, tartrate 0.045-0.055%, E.D.T.A6.045-0.055%, Surfactant OP 0.008-0.002%, water 89.512-69.26%; Its principal feature is first by metal pickling, and then under the condition of 65-70 DEG C phosphatization, its shortcoming is by metal pickling in strong inorganic acid, defect can be brought to the formation of phosphatize phosphate coat, and phosphatization speed is slow, needs heating equally, there is the shortcoming that above-mentioned prior art is identical.

Summary of the invention

The object of the invention is to propose a kind of household electrical appliance room temperature Phosphating technique, this technique, by the component of adjustment Phosphating Solution, makes it can use in room temperature, the phosphatization in convenient household electrical equipment manufacturing processed, and can operation be brushed, to overcome the defect of prior art.

For reaching this object, the present invention by the following technical solutions:

A kind of household electrical appliance room temperature Phosphating technique, the Phosphating Solution that this technique adopts consists of: phosphatase 24 4-48g/L, primary zinc phosphate 24-28g/L, zinc oxide 10-12g/L, monocalcium phosphate 16-20g/L, calcium oxide 6-8g/L, tartrate 6-8g/L, Trisodium Citrate 5-7g/L, oxalic acid 12-14g/L, hydroxylammonium sulfate 3-6g/L, nickelous fluoride 7-9g/L, single nickel salt 6-8g/L, OP-103-5g/L, sodium laurylsulfonate 2-4g/L, surplus is water; Described phosphating process is:

1) household appliance components Solvent degreasing, with clean gasoline or alcohol-pickled 3-5 minute, then seasoning or dry up with pressurized air;

2) alkali liquor oil removing: alkaline wash household appliance components being put into the technical pure sodium hydroxide of 10-20g/L and the technical pure sodium carbonate composition of 30-40g/L, soaks 3-5 minute when temperature is 60-70 DEG C, adopts whipping appts to stir flowing in alkali cleaning liquid bath;

3) phosphatization: said components is prepared into Phosphating Solution, uses acidproof brush directly Phosphating Solution evenly to be brushed one deck phosphatization liquid film on household appliance components, then dry.

The present invention has following beneficial effect:

Instant invention overcomes the defect that phosphatization temperature of the prior art is high, by adjusting the component of Phosphating Solution, it should be made can to use in room temperature, the phosphatization in convenient household electrical equipment manufacturing processed, and can operation be brushed.The phosphatize phosphate coat erosion resistance adopting this Phosphating Solution to prepare is high, and rete is fine and smooth fine and close.And brush owing to adopting, in Phosphating Solution, almost there is no sediment, therefore reduce and drag for the operations such as slag.Reduce costs further.

Embodiment

Embodiment one

A kind of household electrical appliance room temperature Phosphating technique, the Phosphating Solution that this technique adopts consists of: phosphatase 24 4g/L, primary zinc phosphate 28g/L, zinc oxide 10g/L, monocalcium phosphate 20g/L, calcium oxide 6g/L, tartrate 8g/L, Trisodium Citrate 5g/L, oxalic acid 14g/L, hydroxylammonium sulfate 3g/L, nickelous fluoride 9g/L, single nickel salt 6g/L, OP-105g/L, sodium laurylsulfonate 2g/L, surplus is water; Described phosphating process is:

1) household appliance components Solvent degreasing, with clean gasoline or alcohol-pickled 3 minutes, then seasoning or dry up with pressurized air;

2) alkali liquor oil removing: alkaline wash household appliance components being put into the technical pure sodium hydroxide of 10g/L and the technical pure sodium carbonate composition of 40g/L, soaks 5 minutes, adopts whipping appts to stir flowing in alkali cleaning liquid bath when temperature is 60 DEG C;

Embodiment two

A kind of household electrical appliance room temperature Phosphating technique, the Phosphating Solution that this technique adopts consists of: phosphatase 24 8g/L, primary zinc phosphate 24g/L, zinc oxide 12g/L, monocalcium phosphate 16g/L, calcium oxide 8g/L, tartrate 6g/L, Trisodium Citrate 7g/L, oxalic acid 12g/L, hydroxylammonium sulfate 6g/L, nickelous fluoride 7g/L, single nickel salt 8g/L, OP-103g/L, sodium laurylsulfonate 4g/L, surplus is water; Described phosphating process is:

1) household appliance components Solvent degreasing, with clean gasoline or alcohol-pickled 5 minutes, then seasoning or dry up with pressurized air;

2) alkali liquor oil removing: alkaline wash household appliance components being put into the technical pure sodium hydroxide of 20g/L and the technical pure sodium carbonate composition of 30g/L, soaks 3 minutes, adopts whipping appts to stir flowing in alkali cleaning liquid bath when temperature is 70 DEG C;

Embodiment three

A kind of household electrical appliance room temperature Phosphating technique, the Phosphating Solution that this technique adopts consists of: phosphatase 24 6g/L, primary zinc phosphate 26g/L, zinc oxide 11g/L, monocalcium phosphate 18g/L, calcium oxide 7g/L, tartrate 7g/L, Trisodium Citrate 6g/L, oxalic acid 13g/L, hydroxylammonium sulfate 4.5g/L, nickelous fluoride 8g/L, single nickel salt 7g/L, OP-104g/L, sodium laurylsulfonate 3g/L, surplus is water; Described phosphating process is:

1) household appliance components Solvent degreasing, with clean gasoline or alcohol-pickled 4 minutes, then seasoning or dry up with pressurized air;

2) alkali liquor oil removing: alkaline wash household appliance components being put into the technical pure sodium hydroxide of 15g/L and the technical pure sodium carbonate composition of 35g/L, soaks 4 minutes, adopts whipping appts to stir flowing in alkali cleaning liquid bath when temperature is 65 DEG C;

Claims

1. a household electrical appliance room temperature Phosphating technique, is characterized in that, the Phosphating Solution that this technique adopts consists of: phosphatase 24 4-48g/L, primary zinc phosphate 24-28g/L, zinc oxide 10-12g/L, monocalcium phosphate 16-20g/L, calcium oxide 6-8g/L, tartrate 6-8g/L, Trisodium Citrate 5-7g/L, oxalic acid 12-14g/L, hydroxylammonium sulfate 3-6g/L, nickelous fluoride 7-9g/L, single nickel salt 6-8g/L, OP-103-5g/L, sodium laurylsulfonate 2-4g/L, surplus is water; Described phosphating process is: