CN101624699A - Method for preparing passivating agent for acid-washing stainless steel - Google Patents
Method for preparing passivating agent for acid-washing stainless steel Download PDFInfo
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- CN101624699A CN101624699A CN200810023068A CN200810023068A CN101624699A CN 101624699 A CN101624699 A CN 101624699A CN 200810023068 A CN200810023068 A CN 200810023068A CN 200810023068 A CN200810023068 A CN 200810023068A CN 101624699 A CN101624699 A CN 101624699A
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Abstract
The invention relates to surface treatment of stainless steel materials, in particular to a passivating agent for acid-washing stainless steel. The invention discloses a method for preparing a passivating agent for acid-washing stainless steel, which contains (1) 6 to 15 percent of nitric acid, (2) 12 to 20 percent of phosphoric acid, (3) 5 to 10 percent of hydrogen peroxide, (4) 5 to 52 percent of magnesium phosphate and (5) 15 to 20 percent of zinc nitrate. The method is characterized by comprising the following steps: (1) screening raw materials, and analyzing each raw material of the (1), (2), (3), (4) and (5) to ensure that the harmful elements such as fluorine, chlorine, sulfur and sodium can be used when the contents of the harmful elements is required to be less than 500ppm respectively; (2) blending the three raw materials (1), (2) and (3) in a polyethylene container in turn according to a matching ratio, and then carrying out macroporous ion resin adsorption to remove the harmful elements; (3) weighing the two raw materials (4) and (5) according to a mixture ratio, and then rinsing the raw materials with distilled water and dialyzing the raw materials by a double-anode film respectively to remove the harmful elements; and (4) mixing and stirring the raw materials which are qualified in removing the harmful elements evenly to form paste, namely obtaining a finished product. The passivating agent can achieve the effects of safety and high efficiency during use.
Description
Technical field
The present invention relates to a kind of preparation method of passivating agent for acid-washing stainless steel.
Background technology
The oxidation cortex of stainless steel surface is as hard as marble, more is difficult to remove than the zone of oxidation of general steel surface.The harm of this oxidation cortex is a lot, for example influences erosion resistance attractive in appearance, as to reduce material, hinders later processing etc.
All developed various acid-washing stainless steel passivation cream, acid wash passivation liquid at present both at home and abroad, and this class thing all is the reagent that is used for removing Stainless Steel Watch surface oxidized skin layer at normal temperatures and can forms one deck passivation protection film.
But existing problem is, acid wash passivation cream, acid wash passivation liquid product use raw materials such as a large amount of hydrofluoric acid, sulfuric acid, hydrochloric acid, sodium alkyl benzene sulfonate, sodium-chlor, these raw materials all contain elements such as very abundant fluorine, chlorine, sulphur, sodium, these elements could work the mischief to stainless steel, under cover numerous murderous intentions! It does not wash clean because of floating, or infiltrate remaining and stay working-surface, under occasions such as in the future illumination, high temperature, high pressure, high-throughput radiation photograph, utmost point low temperature reversed of stress, they can cause the stainless steel parts to produce pitting, needle-like burn into grain boundary attack, scorching corrosion etc.And this class hot spot has plenty of the direct pathogeny body of material fracture, and what have then is the catalyzer of material fracture.For example low-temperature embrittleness, reheat cracking, pressurized vessel split before leaking, the fatigue of high-speed motion parts is split, brittle fracture under low temperature etc.
Summary of the invention
The technical problem to be solved in the present invention is to overcome above-mentioned the deficiencies in the prior art, a kind of passivating agent for acid-washing stainless steel is provided, its pickling, passivation effect are being not less than outside the existing products in markets, the content of the employed harmful element of also strict restriction, thus make this passivating agent for acid-washing stainless steel reach a kind of safe, effect efficiently.
Concrete technical solution of the present invention is as follows:
A kind of nitric acid 6-15%, 2. phosphatase 11 2-20%, 3. hydrogen peroxide 5-10%, 4. trimagnesium phosphate 5-52%, 5. preparation method of the passivating agent for acid-washing stainless steel of zinc nitrate 15-20% of containing 1. is characterized in that it comprises the following steps:
(1). the screening raw material, with above-mentioned 1. 2. 3. 4. 5. each raw material analyze, harmful element fluorine, chlorine, sulphur, sodium content must can use below 500ppm respectively;
(2) with above-mentioned 1. 2. 3. three kinds of raw materials mix mutually successively in polythene container by proportioning, carry out macropore ion exchange resin absorption then, take off harmful element and handle;
(3) with above-mentioned 4. 5. two kinds of raw materials take by weighing by proportioning, respectively with distilled water rinsing, the dialysis of double anode film, take off harmful element and handle then;
(4) will take off the qualified raw material of harmful element, mix finished product.
Technique effect of the present invention is:
When using, the present invention can reach a kind of safe, effect efficiently.
Embodiment
The invention will be further described below to enumerate embodiment, and unit is weight percent %:
| Raw material | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| 1. nitric acid | ??6 | ??20 | ??15 |
| 2. phosphoric acid | ??12 | ??35 | ??25 |
| 3. hydrogen peroxide | ??5 | ??15 | ??10 |
| 4. trimagnesium phosphate | ??62 | ??5 | ??30 |
| 5. zinc nitrate | ??15 | ??25 | ??20 |
Passivating agent for acid-washing stainless steel raw material in the foregoing description 1,2,3 is prepared according to being prepared as follows method respectively:
(1) screening raw material, with above-mentioned 1. 2. 3. 4. 5. each raw material analyze, harmful element fluorine, chlorine, sulphur, sodium content must can use below 500ppm respectively;
(2) will be 1. 2. 3. three kinds of raw materials mix mutually successively in polythene container by proportioning, carry out the absorption of macropore ion exchange resin then, take off harmful element and handle;
(3) will be 4. 5. two kinds of raw materials take by weighing by proportioning, respectively with distilled water rinsing, the dialysis of double anode film, take off harmful element and handle then;
(4) raw material that will take off harmful element mix, stir finished product.
Claims (1)
1, a kind of nitric acid 6-15%, 2. phosphatase 11 2-20%, 3. hydrogen peroxide 5-10%, 4. trimagnesium phosphate 5-52%, 5. preparation method of the passivating agent for acid-washing stainless steel of zinc nitrate 15-20% of containing 1. is characterized in that it comprises the following steps:
(1) screening raw material, with above-mentioned 1. 2. 3. 4. 5. each raw material analyze, harmful element fluorine, chlorine, sulphur, sodium content must can use below 500ppm respectively;
(2) with above-mentioned 1. 2. 3. three kinds of raw materials mix mutually successively in polythene container by proportioning, carry out macropore ion exchange resin absorption then, take off harmful element and handle;
(3) with above-mentioned 4. 5. two kinds of raw materials take by weighing by proportioning, respectively with distilled water rinsing, the dialysis of double anode film, take off harmful element and handle then;
(4) will take off the qualified raw material of harmful element, and mix, be stirred into paste and get product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810023068A CN101624699A (en) | 2008-07-11 | 2008-07-11 | Method for preparing passivating agent for acid-washing stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810023068A CN101624699A (en) | 2008-07-11 | 2008-07-11 | Method for preparing passivating agent for acid-washing stainless steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101624699A true CN101624699A (en) | 2010-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810023068A Pending CN101624699A (en) | 2008-07-11 | 2008-07-11 | Method for preparing passivating agent for acid-washing stainless steel |
Country Status (1)
| Country | Link |
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| CN (1) | CN101624699A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102965673A (en) * | 2012-11-28 | 2013-03-13 | 中国铝业股份有限公司 | Method for cleaning stainless steel impeller of water pump |
| CN103320778A (en) * | 2012-03-20 | 2013-09-25 | 春兴铸造(苏州工业园区)有限公司 | Aviation pipe stainless steel passivation technology |
| CN103949388A (en) * | 2014-03-24 | 2014-07-30 | 宁波宝迪汽车部件有限公司 | Coating method of electric vehicle hub |
-
2008
- 2008-07-11 CN CN200810023068A patent/CN101624699A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103320778A (en) * | 2012-03-20 | 2013-09-25 | 春兴铸造(苏州工业园区)有限公司 | Aviation pipe stainless steel passivation technology |
| CN103320778B (en) * | 2012-03-20 | 2015-09-23 | 春兴铸造(苏州工业园区)有限公司 | A kind of aviation pipe stainless steel passivation process |
| CN102965673A (en) * | 2012-11-28 | 2013-03-13 | 中国铝业股份有限公司 | Method for cleaning stainless steel impeller of water pump |
| CN103949388A (en) * | 2014-03-24 | 2014-07-30 | 宁波宝迪汽车部件有限公司 | Coating method of electric vehicle hub |
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| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100113 |