CN1049871A - A kind of converting agent of iron rust and using method thereof - Google Patents
A kind of converting agent of iron rust and using method thereof Download PDFInfo
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- CN1049871A CN1049871A CN 89106642 CN89106642A CN1049871A CN 1049871 A CN1049871 A CN 1049871A CN 89106642 CN89106642 CN 89106642 CN 89106642 A CN89106642 A CN 89106642A CN 1049871 A CN1049871 A CN 1049871A
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- iron rust
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- converting agent
- organic acid
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Abstract
A kind of converting agent of iron rust and use this converting agent of iron rust, the lip-deep iron rust of steel is changed into hard, the method for the protective layer of strong adhesion.Wherein converting agent of iron rust comprises 40-45% (weight) phosphoric acid, 9-10% (weight) organic acid, 1-2% (weight) metal carbonate, the metal-powder of the 5-9% (weight) of 35-45% (weight) deionized water.
Description
The present invention relates to a kind of phosphoric acid that comprises, organic acid, metal carbonate, the liquid-solid two-phase converting agent of iron rust of deionized water and metal-powder.
The converting agent of iron rust that the invention still further relates to a kind of the application of the invention is hard changing into one deck attached to the iron rust on the surface of steel plate, the method for the protective layer of strong adhesion.
AU-B-17531/83 discloses a kind of metallic surface chemical conversion that is used for, to improve the solution of metallic surface erosion resistance.This solution comprises for every liter:
At least 0.2 mmole is with (XPO
3) polyphosphate represented of n formula, n in the formula 〉=3, X is a basic metal, alkaline-earth metal or ammonium,
At least 0.3 mmole organic sequestering agent and
At least 0.15qt.-g zine ion.
But this solution has such shortcoming, promptly before using, must carry out surface degreasing, treatment steps such as rinsing and pickling to the metal that needs are handled.
Up to now, before the steel finish coatings, all need as engraving cutter, flame washing, sandblast etc. or chemical process such as acid etching the steel surface to be handled, to remove its lip-deep iron rust or rust sheet through mechanical means.Engrave the washing of cutter and flame and often the iron rust of metallic surface can not be removed totally, the paint of coating so just can not removed clean place at iron rust and is peeled off prematurely.Sand-blast needs good labour protection, avoids operator to get stone foam thesaurismosis.The shortcoming of aciding is to remove a thin layer of surface of steel ingot oxide skin and iron layer, and the surface after cleaning is easy to rust soon.
The object of the present invention is to provide a kind of converting agent of iron rust, the protective coating that it has the ability of strong infiltration iron rust and iron rust is changed into hard strong adhesion.When using converting agent of iron rust of the present invention, the steel plate that needs to handle needn't take off rust in advance fully, thereby, remove the equipment that uses the high removing surface of steel plate rusty scale of cost from.
Another object of the present invention provides a kind of method of using converting agent of iron rust protection rusty plate of the present invention.
In converting agent of iron rust, phosphoric acid is a general component, the existence of metal carbonate can with the reaction of vitriol in the iron rust, help generating a kind of phosphoric acid salt and be fixed up.Metal-powder can assist iron rust is changed into magnetite.Formed the present composition based on this principle, promptly by phosphoric acid, organic acid, metal carbonate, the converting agent of iron rust that water and metal-powder are formed.
According to converting agent of iron rust of the present invention, wherein contain
The 40-45%(weight) phosphoric acid (80%);
The 9-10%(weight) organic acid, organic acid can be C
1～C
5Organic acid is preferably C
2～C
3Organic acid, especially acetate;
The 1-2%(weight) metal carbonate, metal carbonate can be zinc carbonate, magnesiumcarbonate and manganous carbonate are preferably manganous carbonate;
The 35-45%(weight) deionized water;
The 5-9%(weight) metal-powder, metal-powder can be zinc powder or iron powder, preferably 100 order iron powders.
According to the two-phase compositions that converting agent of iron rust of the present invention is made up of liquid phase and solid phase, solid phase wherein is a metal-powder.Metal-powder added before converting agent of iron rust uses as activator.Leave standstill behind the adding metal-powder and just can use in 30-40 minute.With metallic brush the loose rust sheet on the rusty plate is scraped, utilize squeegee process or spraying with the converting agent of iron rust coated on the surface of 3 " * 2 " (laboratory with) and 6 " * 4 " (on-the-spot exposure test usefulness) rusty plate.Every liter of converting agent of iron rust can coated 9.0 square metres rusty plate surface.When being coated with surface of steel plate and being black, drying and hardened condition, illustrate attached to the iron rust on the steel plate to be converted into hard protective layer.Iron rust changes into protective layer generally needs 10-60 minute.
Sometimes coated one deck priming paint and/or finishing paint on the steel plate that iron rust has transformed as required.Usually used suitable priming paint is colcother or colcother zinc chromate; Suitable finishing paint is alkyd titanium dioxide or chlorinated rubber.
Further describe the present invention with concrete experimental technique below.
(a) adhesion test
The steel plate that iron rust has been transformed is placed on the flat surfaces with horizontal direction.Draw many grids with a sharp draw point at surface of steel plate.An adhesive tape is attached to steel plate by on the partition territory.Putting a felt pan on the adhesive tape and on felt pan, applying-weight of 1kg.After one hour, remove weight and felt pan, fast adhesive tape is peelled off from being coated with steel plate.
(b) scratch test
Do the scratch experiment with the automatic scratch machine of Sheen ' s.The steel plate that iron rust has been transformed is installed on the sliding panel.Apply the power of 1kg to the pin folder.Needle point is reduced to and produces the long cut of a treaty 6cm on the test steel plate, checks whether expose base metal in the trace then.
(c) area coverage and time of drying
Use one liter of converting agent of iron rust coated rusty plate, when being coated with surface of steel plate and being black, drying and hardened condition, illustrate that iron rust has changed into hard protective layer.Measure the area that covers steel plate, measure iron rust simultaneously and change into hard protective layer required time, i.e. time of drying.
(d) heatproof test
It is in 150 ℃ the loft drier, to place 60 minutes that the test specimen that iron rust has been transformed is placed on temperature, then with its taking-up, checks whether its surface has coating shedding.
(e) corrosion failure test
1. that will be handled by converting agent of iron rust of the present invention and through acid etching, 3 " * 2 " steel plate that hand washing is handled is immersed in the distilled water 25 days respectively.The erosion resistance of each test specimen sees Table 1.
2. 3 " * 2 " mild steel plate that iron rust has been transformed or process acid etching or hand washing is coated colcother zinc chromate priming paint and/or alkyd titanium dioxide finishing paint respectively.In the laboratory, (3%NaCl) is sprayed on the test specimen steel plate with salt solution, and in the salt-fog chamber, places 25 days, and observe phenomena the results are shown in Table 1 periodically.
(f) iron rust has been transformed test specimen and through acid etching, test specimen coated one deck priming paint and/or finishing paint respectively made salt-fog test (25 days) after the phosphorylation, the results are shown in Table 2.
(g) inorganic salt in the iron rust are to the influence test of coating
The inorganic salt (sodium-chlor and sodium sulfate) that are present in the iron rust influence test as follows to corrosive: the rusty plate that will be of a size of 7.5 * 5cm is immersed in 3% sodium-chlor or 3% metabisulfite solution and spends the night, and withdraws from and drying.One group of test specimen is wherein washed with water, second group of test specimen methanol wash, the 3rd group of test specimen washs with the lithium hydroxide ethanolic soln.Each is organized the test specimen surface and handles with converting agent of iron rust.Test specimen coated one deck priming paint and/or finishing paint that iron rust has transformed carry out 25 days salt-fog test then.Compare with the test specimen of handling without converting agent of iron rust, the results are shown in Table 3.
(h) exposure test
6 " * 4 " mild steel plate coated one deck priming paint and/or finishing paint that iron rust has been transformed.Test specimen being exposed by the sea to the open air (45 meters in water off sea is far away), was that one-period is observed with three months, the results are shown in Table 4.
Table 1. iron rust has transformed or the unconverted mild steel plate of iron rust (m.s)
Test at corrosion failure behind coated priming paint and/or the finishing paint
Result in (25 days)
Distilled water 3% sodium chloride salt spray test
Handle type submergence submergence (3% sodium-chlor)
1. iron rust transforms
Agent+priming paint no change minute quantity blister no change
2. iron rust transforms
Agent+finishing paint does not have the no change of influence no change
3. acid etching+priming paint all rustization of rustization of becoming rusty on a small quantity
Spot
4. acid etching+facing floats all rust of a small amount of rust staining on a small quantity
The lacquer bubble
5. whole serious rustization japanning flakiness of rust of hand washing+priming paint
Change rustization
6. the whole rustization rustization fully of a small amount of rust of hand washing+facing
The lacquer spot
Annotate: priming paint: colcother zinc chromate
Finishing paint: alkyd titanium dioxide
Table 2. iron rust has transformed test specimen and acid etching and phosphorylation test specimen
Salt-fog test (25 days) result
Treatment process japanning systematic observation result rust percentage ratio
（%）
Hydrochloric acid colcother priming paint and
Middle acid etching chlorinated rubber decorations surface is 70-80 all
Finish paint brown rustization
2. the same comprehensive blister 25-30 of phosphorylation
3. iron rust changes
Change agent processing chlorinated rubber and adorn local 10-15 out of the ordinary
The a small amount of rust staining of finish paint
Table 3. in salt-fog test (25 days),
Inorganic salt are to the influence of the test specimen that gets rusty
Handle type observations rustization percentage ratio
（%）
1. the serious rust 90-95 of sodium chloride-containing in the iron rust
2. there is rust staining 10-15 in sodium chloride-containing in the iron rust+each other places
Converting agent of iron rust
Sodium chloride-containing in the iron rust+
Converting agent of iron rust, wherein
(a) wash each other places with water rust staining 15 is arranged
(b) with the same 5-10 of methanol wash
(c) with lithium hydroxide methyl alcohol the same 20
Solution washing
4. the serious rust 75-80 of contains sodium sulfate in the iron rust
Table 3(is continuous) in salt-fog test (25 days),
Inorganic salt are to the influence of the test specimen that gets rusty
Handle type observations rustization percentage ratio
（%）
5. there is rust staining 10-15 in contains sodium sulfate in the iron rust+each other places
Converting agent of iron rust
Contains sodium sulfate in the iron rust+
Converting agent of iron rust, wherein
(a) wash each other places with water rust staining 10-15 is arranged
(b) with the same 10-15 of methanol wash
(c) with the same 10-15 of lithium hydroxide methyl alcohol
Solution washing
Annotate: each test specimen all is coated with one deck colcother priming paint and one deck chlorinated rubber finishing paint
Table 4. seashore (45 meters in water off sea is far away)
Exposure test (10 months)
Treatment process m.s. angle steel 6 " * 4 " slab
1. hand washing+priming paint is generally poor
2. acid etching+priming paint difference is poor
3. iron rust has transformed fine
+ priming paint
4. hand washing+priming paint is general
+ finishing paint
5. acid etching+priming paint is generally poor
+ finishing paint
6. iron rust has transformed outstanding fine
+ priming paint+finishing paint
Annotate: priming paint: colcother zinc chromate I.S.2074
Finishing paint: alkyd titanium dioxide
By the microtexture photo explanation of coated, can obtain the meticulous uniform coating of the hard strong adhesion of one deck to rusty plate surface coated converting agent of iron rust by the test specimen top coat of converting agent of iron rust of the present invention.Converting agent of iron rust and iron rust reaction change into magnetite with iron rust and embed in the metal tripolyphosphate salt deposit.
The physicals that has transformed test specimen by the mensuration iron rust shows that the test specimen that iron rust has transformed has extraordinary sticking power, because adhesive tape does not have coating shedding after pulling.Test specimen has passed through load and has not exposed base metal for the scratch test of 1kg.One liter of converting agent of iron rust solution can coated 9 square metres rusty plate surface, and need 10-60 minute drying.But heatproof test shows iron rust and has transformed steel plate coating heatproof to 150 ℃, illustrates to can be used for the baking vanish occasion.
Table 1 has provided the corrosion failure test-results.As can be seen from Table 1, the test specimen by converting agent of iron rust coated of the present invention can be protected lasting 25 days in immersion test and salt fog spray test.Compare with test specimen through hand washing and acid etching and coated priming paint and/or finishing paint, test specimen through converting agent of iron rust processing of the present invention and coated priming paint and/or finishing paint, in salt spray test and distilled water, sodium chloride solution immersion test, do well, substantially rustization phenomenon not.
As can be seen from Table 2, in salt-fog test, the surface rust divides and does not reach 70-80% and 25-30% through the test specimen of acid etching or phosphorylation and coated priming paint and finishing paint, and handles and the test specimen rustization of coated finishing paint has only 10-15% through converting agent of iron rust of the present invention.
Table 3 be in salt-fog test (25 days) inorganic salt to the influence of the test specimen that gets rusty.Table 3 has provided the performance in salt-fog test behind the rusty plate coated priming paint that contains sodium-chlor or sodium sulfate and the finishing paint and has contained sodium-chlor or the rusty plate of sodium sulfate is handled and the performance of test specimen in salt-fog test of coated priming paint and finishing paint through solvent wash and through converting agent of iron rust of the present invention.As can be seen from Table 3, contain inorganic salt and scribble priming paint and the test specimen rustization of finishing paint reaches 70-90%, and with solvent wash and the test specimen handled through converting agent of iron rust of the present invention, rustization is about 5-10%.
Table 4 is seashore (45 meters in water off sea) exposure tests.It has provided through steel plate that different methods the is handled observations in the exposure test by the sea.The result shows, through steel plate that converting agent of iron rust of the present invention is handled after (45 meters in water off sea) places 10 months by the sea, and the still fine phenomenon of not getting rusty of painted surface, and the steel plate rustization phenomenon of handling without converting agent of iron rust is serious.
Embodiment:
Raw material: 80% ortho-phosphoric acid 2700ml
Manganous carbonate 180g
Acetate 900ml
Deionized water 4500ml
100 order iron powder 900g
Deionized water is poured in the stainless steel vessel, under agitation added ortho-phosphoric acid then lentamente.Continue to stir diluted acid so that thorough mixing.Under agitation add manganous carbonate in batches.In case material overflows reactor.After adding, continues manganous carbonate to stir 15 minutes.The color of solution is garnet or purple.Stir down and acetate is added in the above-mentioned solution color modified line of solution.In 30 minutes, above-mentioned solution is added to 70 ℃, illustrate that when solution becomes light brown each component fully dissolves.Filter said mixture, gained liquid is prepared step use down.
Add iron powder in the above-mentioned solution and left standstill 30-40 minute, just obtain the liquid-solid two-phase converting agent of iron rust,
Claims (11)
1, a kind of liquid-solid two-phase converting agent of iron rust, comprising:
The ortho-phosphoric acid (80%) of 40-45% (weight);
The organic acid of 9-10% (weight), organic acid can be C
1～C
5Organic acid is preferably C
2～C
3Organic acid,
The metal carbonate of 1-2% (weight); Metal carbonate is selected from zinc carbonate, magnesiumcarbonate and manganous carbonate;
The deionized water of 35-45% (weight) and
The metal-powder of 5-9% (weight).
2, the converting agent of iron rust of claim 1, organic acid wherein are acetate.
3, the converting agent of iron rust of claim 1, metal carbonate wherein are manganous carbonate.
4, the converting agent of iron rust of claim 1, metal-powder wherein are 100 purpose iron powders.
5, a kind of handle changes into hard attached to the iron rust on the surface of steel plate; the method of the protective layer of strong adhesion; this method comprises: coated one deck converting agent of iron rust on rusty plate; as required also can be after iron rust changes into protective layer; coated one deck priming paint and/or finishing paint, wherein converting agent of iron rust contains:
40-45%(weight) ortho-phosphoric acid (80%);
9-10%(weight) organic acid, organic acid can be C
1～C
5Organic acid is preferably C
2～C
3Organic acid;
1-2%(weight) metal carbonate, metal carbonate is selected from zinc carbonate, magnesiumcarbonate and manganous carbonate;
35-45%(weight) deionized water and
5-9%(weight) metal-powder.
6, the method for claim 5, it is characterized in that utilizing squeegee process or spraying method with the converting agent of iron rust coated on rusty plate.
7, the method for claim 5, it is characterized in that every liter of converting agent of iron rust can coated 9 square metres the steel surface of getting rusty.
8, the method for claim 5 is characterized in that iron rust is changed into protective layer needs 10-60 minute drying.
9, the method for claim 5, wherein said priming paint are colcother or colcother zinc chromate, and finishing paint is alkyd titanium dioxide or chlorinated rubber.
10, the method for claim 5, but it is characterized in that the coating heatproof that iron rust has transformed reaches 150 ℃.
11, the method for claim 5 is used for the baking vanish occasion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89106642 CN1049871A (en) | 1989-08-30 | 1989-08-30 | A kind of converting agent of iron rust and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89106642 CN1049871A (en) | 1989-08-30 | 1989-08-30 | A kind of converting agent of iron rust and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1049871A true CN1049871A (en) | 1991-03-13 |
Family
ID=4856829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89106642 Pending CN1049871A (en) | 1989-08-30 | 1989-08-30 | A kind of converting agent of iron rust and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1049871A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1074062C (en) * | 1999-12-03 | 2001-10-31 | 冶金工业部钢铁研究总院 | Converting agent of iron rust |
| CN102191492A (en) * | 2010-03-19 | 2011-09-21 | 浙江海洋学院 | Rust transforming agent |
-
1989
- 1989-08-30 CN CN 89106642 patent/CN1049871A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1074062C (en) * | 1999-12-03 | 2001-10-31 | 冶金工业部钢铁研究总院 | Converting agent of iron rust |
| CN102191492A (en) * | 2010-03-19 | 2011-09-21 | 浙江海洋学院 | Rust transforming agent |
| CN102191492B (en) * | 2010-03-19 | 2012-07-25 | 浙江海洋学院 | Rust transforming agent |
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