CN101429660A - Derusting phosphating liquor used for ferrous metal product surface - Google Patents
Derusting phosphating liquor used for ferrous metal product surface Download PDFInfo
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- CN101429660A CN101429660A CNA2007101579810A CN200710157981A CN101429660A CN 101429660 A CN101429660 A CN 101429660A CN A2007101579810 A CNA2007101579810 A CN A2007101579810A CN 200710157981 A CN200710157981 A CN 200710157981A CN 101429660 A CN101429660 A CN 101429660A
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- rust removal
- phosphatization liquid
- phosphatization
- ferrous metal
- rust
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Abstract
The invention relates to a rust removal phosphatization liquid used on the surface of a ferrous metal product, which is a preferred pretreatment procedure for a small steel product before painting. The phosphatization liquid comprises the following components according to the weight proportion to phosphoric acid to zinc phosphate to tartaric acid to thiourea to water is equal to 20-25:5-8:2-4:0.1-0.2:60-80. The rust removal phosphatization liquid has a reasonable process and few procedures, can improve the work efficiency and shorten the production cycle. Compared with sulfuric acid or hydrochloric acid used for rust removal, the rust removal phosphatization liquid has less pollution, improved labor conditions and less harm to operators. The rust between procedures is basically removed. A phosphatization film has the advantages of certain corrosion prevention, the improved adhesive force between a painting layer and a basal body, and the like. In addition, the rust removal phosphatization liquid is stable and has a long service life.
Description
Technical field
The present invention relates to a kind of process for treating surface of ferrous metal product, relate in particular to a kind of derusting phosphating liquor that is used for ferrous metal product surface.It is first-selected pretreatment process before the small-sized steel product japanning.
Background technology
The loss that steel corrosion caused is very surprising.Statistical figure according to relevant departments show that the steel product of scrapping owing to corrosion every year is equivalent to 1/3rd of annual metal output in the world.Yet the loss that caused of the suspending operation or slashing production that causes because of equipment or corrosive pipeline or a large amount of industrial raw material seepage sometimes is much larger than the corrosive loss of material own.Before dispatching from the factory, all to carry out anti-corrosive treatment to steel product based on above-mentioned situation, to reduce the work-ing life that corrosion prolongs goods.The weather-resistant in the past common practice is to paint in the protection against corrosion of steel product external coating.But must before japanning, the iron rust of product surface be cleaned out for guaranteeing painting quality.Normally carry out sandblast or acid pickling and rust removing.Must in specific time, paint after this pretreatment procedure, otherwise will produce corrosion once more.For the big area rust cleaning of fixing steel equipment or the tall and big specific installation of fighting etc. and so on, but be a very arduous heavy and inefficient work particularly, a carelessness quality also is difficult to guarantee slightly.Therefore, have on rust paint to come out, particularly the rust cleaning to large and medium-sized steel equipment more manifests its remarkable advantages, has brought into play active effect, is subjected to user's welcome deeply.But also there is steel-iron components to small serial production, or finding in large batch of, the single-piece painting efficiency is low, the unconspicuous part not fully up to expectations of advantage.To the common in the past practice of described component be successively through deoil, washing, acid pickling and rust removing, washing, alkali lye neutralization, cold and hot washing, drying, what have afterwards also will pass through cold wash, bonderizing, cold and hot washing, drying.Just paint later by above-mentioned multiple working procedure processing.However since after the pickling certain operation slightly a carelessness also happen occasionally in the phenomenon that corrosion takes place again inter process, more outstanding in the performance in season of summer high temperature high humidity especially increases the production cost of labor capacity and enterprise to the direct labor.
Summary of the invention
The present invention is directed to above-mentioned problems of the prior art, provide a kind of simplification technology, the prescription simply nontoxic, rust cleaning and phosphatization are one organic the appearance, in rust cleaning, make product surface generate the skim phosphatize phosphate coat, not only there is certain anti-corrosion capability can increase enamelled coating and matrix adhesive force again, reduce and pollute the derusting phosphating liquor of improving working conditions.
Technical scheme of the present invention is as follows:
It is formulated by weight by following compositions, phosphoric acid: zinc phosphate: tartrate: thiocarbamide: water=20-25:5-8:2-4:0.1-0.2:60-80.
Advantage of the present invention and beneficial effect are as follows:
The present invention compared with prior art once finishes with phosphatization owing to will eliminate rust, and has through evidence that technology is reasonable, operation is few, improves work efficiency and shortens the production cycle, and is little with sulfuric acid or hydrochloride derusting pollution, improves working conditions, and the operator endangered little; The corrosion of basically eliminate inter process, phosphatize phosphate coat have certain anti-corrosion capability, increase the advantages such as sticking power of enamelled coating and matrix, and in addition, derusting phosphating liquor is stable, long service life.
Derusting phosphating liquor of the present invention is to corrode the mechanism that belongs to galvanic corrosion according to iron and steel in atmosphere.So iron and steel contact ionogen in atmosphere, there is potential difference in ununiformity Ben Shen in addition, and the depolarize of oxygen is done and produced corrosion, and its corrosion product is a very complicated metal oxide, but its main component is ferric oxide and iron protoxide.Generate compounds such as a hydrogen tertiary iron phosphate, a hydrogen zinc phosphate and tertiary iron phosphate, zinc phosphate in derusting phosphating liquor, the also integral part of phosphatize phosphate coat just simultaneously when continuing the reaction steel surface and covered fully by phosphatize phosphate coat, is a parkerizing process.
Embodiment
The present invention further describes summary of the invention by embodiment.
Embodiment 1
The configuration of solution: the thiocarbamide of the industrial phosphoric acid of 20Kg proportion 1.7,6Kg zinc phosphate, 2Kg tartrate and 0.1Kg adds respectively in the groove of containing 71.9 kg water, stirs it is dissolved fully; Tank liquor temperature is a room temperature, will handle steel-iron components and wash into the derusting phosphating groove through oil removing, and time length is decided with corrosion degree, 5-10 minute usually, takes out dry.
Embodiment 2
The thiocarbamide of getting industrial phosphoric acid, 8g zinc phosphate, 4g tartrate and the 0.2g of 25g proportion 1.7 adds respectively in the groove of containing 62.8Kg water, stirs it is dissolved fully; Tank liquor temperature is 45-50 ℃, and being used for removing serious corrosion part, time is 8 minutes, and other are identical with embodiment 1.
With the steel-iron components that derusting phosphating liquor of the present invention was handled, stainless at indoor storage 7-30 days, eliminated the inter process corrosion phenomena, and can be used with any end, finish paint.
Claims (2)
1, a kind of derusting phosphating liquor that is used for ferrous metal product surface is characterized in that by following compositions by weight formulated phosphoric acid: zinc phosphate: tartrate: thiocarbamide: water=20-25:5-8:2-4:0.1-0.2:60-80.
2, the derusting phosphating liquor that is used for ferrous metal product surface according to claim 1 is characterized in that the weight ratio of above-mentioned each raw material is phosphoric acid: zinc phosphate: tartrate: thiocarbamide: water=20:6:2:0.1:71.9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101579810A CN101429660A (en) | 2007-11-06 | 2007-11-06 | Derusting phosphating liquor used for ferrous metal product surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101579810A CN101429660A (en) | 2007-11-06 | 2007-11-06 | Derusting phosphating liquor used for ferrous metal product surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101429660A true CN101429660A (en) | 2009-05-13 |
Family
ID=40645293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101579810A Pending CN101429660A (en) | 2007-11-06 | 2007-11-06 | Derusting phosphating liquor used for ferrous metal product surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101429660A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104532219A (en) * | 2014-12-11 | 2015-04-22 | 国家电网公司 | Chemical conversion coating liquid coating organic coating on rusty membrane substrate of electric transmission and transformation equipment |
| CN107099790A (en) * | 2017-06-21 | 2017-08-29 | 启东镭尚机电有限公司 | A kind of metal rust preventing phosphating solution |
-
2007
- 2007-11-06 CN CNA2007101579810A patent/CN101429660A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104532219A (en) * | 2014-12-11 | 2015-04-22 | 国家电网公司 | Chemical conversion coating liquid coating organic coating on rusty membrane substrate of electric transmission and transformation equipment |
| CN107099790A (en) * | 2017-06-21 | 2017-08-29 | 启东镭尚机电有限公司 | A kind of metal rust preventing phosphating solution |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090513 |