CN105695972A - Steel blackening process - Google Patents
Steel blackening process Download PDFInfo
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- CN105695972A CN105695972A CN201410701724.9A CN201410701724A CN105695972A CN 105695972 A CN105695972 A CN 105695972A CN 201410701724 A CN201410701724 A CN 201410701724A CN 105695972 A CN105695972 A CN 105695972A
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- blackening
- steel
- rinsing
- washing
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Abstract
The invention discloses a steel blackening process. The steel blackening process is characterized by comprising the following steps of chemical degreasing, rinsing, acid pickling, rinsing, blackening, rinsing, soap liquid soaking, rinsing, blow-drying, oil immersing and sealing, and airing. According to the steel blackening process provided by the invention, blackening treatment is carried out by using a selenium-free blackening agent so that a black conversion film with good film coating quality, high adhesive force and high corrosion resistance can be obtained. The steel blackening process has the advantages of normal-temperature use, low cost, convenient operation, non-toxicity and high efficiency.
Description
Technical field
The invention belongs to metal surface treatment process field, specifically a kind of steel blackening technique。
Background technology
All employings selenium one bronze medal system relatively successful and representative in existing room temperature blackening technique, the Monohydrated selenium dioxide or the dioxy marrow selenium that wherein contain are not only expensive, there is severe toxicity, and aftertreatment technology is complicated, production cost is high, working environment is not ideal enough, its popularization and application are made to be restricted. room temperature blackening treatment technology, developing direction from now on should be reduce cost, alleviate toxicity, improve film quality, stablize solution, prevent from polluting and improving building ring, so existing steel blackening technique needs to be optimized further improvement。
Summary of the invention
It is an object of the invention to for Shortcomings part in above-mentioned technology, the present invention provides a kind of steel blackening technique, has adhesive force strong, and the black conversion film that corrosion resistance is high is with low cost, easy to operate, the advantage of non-toxic efficient
The technical scheme realizing the object of the invention is as follows:
A kind of steel blackening technique, it is characterized in that, comprise the steps of electrochemical deoiling → washing → pickling → washing → blackout → washing → leaching liquid soap → wash → dry up → immersion oil to close → dry, electrochemical deoiling: sodium phosphate 40-6g/L, sodium carbonate 10-15g/L, sodium silicate 20-25g/L, sodium dodecyl 30-35g/L, temperature 65-75 DEG C, time 15-20min；Acid pickling and rust removing: sulphuric acid 100-150g/L, adds the corrosion inhibiter of 5-6g/L, carries out under room temperature, until rust Ex-all；Blackout: workpiece is direct plungeed into and impregnates in hair blackening liquid and shake 15-20min, carry out blackening process；Leaching liquid soap: soap lO-12g/L, sodium carbonate lO-12g/L, temperature 60-75 DEG C；Immersion oil: immerse dewatering rust preventive oil, took out after 5-10 minute, dry workpiece。
A kind of steel blackening technique of the present invention, this technique adopts and carries out blackening process without selenium blackening agent for surface, it is possible to obtain film quality is good, adhesive force is strong, the black conversion film that corrosion resistance is high, and this blackening has room temperature and uses, with low cost, easy to operate, the advantage of non-toxic efficient。
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described:
A kind of steel blackening technique, comprise the steps of electrochemical deoiling → washing → pickling → washing → blackout → washing → leaching liquid soap → wash → dry up → immersion oil to close → dry, electrochemical deoiling: sodium phosphate 40-6g/L, sodium carbonate 10-15g/L, sodium silicate 20-25g/L, sodium dodecyl 30-35g/L, temperature 65-75 DEG C, time 15-20min；Acid pickling and rust removing: sulphuric acid 100-150g/L, adds the corrosion inhibiter of 5-6g/L, carries out under room temperature, until rust Ex-all；Blackout: workpiece is direct plungeed into and impregnates in hair blackening liquid and shake 15-20min, carry out blackening process；Leaching liquid soap: soap lO-12g/L, sodium carbonate lO-12g/L, temperature 60-75 DEG C；Immersion oil: immerse dewatering rust preventive oil, took out after 5-10 minute, dry workpiece。
The preferred embodiment of the present invention described in detail above。Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to the design of the present invention without creative work。All technical staff in the art, all should in the protection domain being defined in the patent claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment。
Claims (1)
1. a steel blackening technique, it is characterized in that, comprise the steps of electrochemical deoiling → washing → pickling → washing → blackout → washing → leaching liquid soap → wash → dry up → immersion oil to close → dry, electrochemical deoiling: sodium phosphate 40-6g/L, sodium carbonate 10-15g/L, sodium silicate 20-25g/L, sodium dodecyl 30-35g/L, temperature 65-75 DEG C, time 15-20min；Acid pickling and rust removing: sulphuric acid 100-150g/L, adds the corrosion inhibiter of 5-6g/L, carries out under room temperature, until rust Ex-all；Blackout: workpiece is direct plungeed into and impregnates in hair blackening liquid and shake 15-20min, carry out blackening process；Leaching liquid soap: soap lO-12g/L, sodium carbonate lO-12g/L, temperature 60-75 DEG C；Immersion oil: immerse dewatering rust preventive oil, took out after 5-10 minute, dry workpiece。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410701724.9A CN105695972A (en) | 2014-11-28 | 2014-11-28 | Steel blackening process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410701724.9A CN105695972A (en) | 2014-11-28 | 2014-11-28 | Steel blackening process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105695972A true CN105695972A (en) | 2016-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410701724.9A Pending CN105695972A (en) | 2014-11-28 | 2014-11-28 | Steel blackening process |
Country Status (1)
| Country | Link |
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| CN (1) | CN105695972A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106868490A (en) * | 2016-12-22 | 2017-06-20 | 当涂县宏宇金属炉料有限责任公司 | A kind of environmentally friendly stainless steel blackening process method |
| CN107245712A (en) * | 2017-06-08 | 2017-10-13 | 安徽江南机械有限责任公司 | A kind of cold black coslettising prepreg solution of stability and high efficiency |
| CN111748810A (en) * | 2020-06-30 | 2020-10-09 | 广东天承科技有限公司 | Blackening solution and preparation method and use method thereof |
-
2014
- 2014-11-28 CN CN201410701724.9A patent/CN105695972A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106868490A (en) * | 2016-12-22 | 2017-06-20 | 当涂县宏宇金属炉料有限责任公司 | A kind of environmentally friendly stainless steel blackening process method |
| CN107245712A (en) * | 2017-06-08 | 2017-10-13 | 安徽江南机械有限责任公司 | A kind of cold black coslettising prepreg solution of stability and high efficiency |
| CN111748810A (en) * | 2020-06-30 | 2020-10-09 | 广东天承科技有限公司 | Blackening solution and preparation method and use method thereof |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160622 |
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| WD01 | Invention patent application deemed withdrawn after publication |