CN100348779C - Natural green acid washing slow corrosion agent and its use - Google Patents
Natural green acid washing slow corrosion agent and its use Download PDFInfo
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- CN100348779C CN100348779C CNB2004100504334A CN200410050433A CN100348779C CN 100348779 C CN100348779 C CN 100348779C CN B2004100504334 A CNB2004100504334 A CN B2004100504334A CN 200410050433 A CN200410050433 A CN 200410050433A CN 100348779 C CN100348779 C CN 100348779C
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- corrosion inhibitor
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- acid washing
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Abstract
The present invention discloses green acid washing corrosion inhibitor and application thereof. The green acid cleaning corrosion inhibitor comprises the following components by weight percentage of 80 to 98 % of berberine hydrochloride, 0.1 to 10 % of epiberberine hydrochloride and 0.1 to 10 % of jatrorrhizine hydrochloride. The application is characterized in that acid wash is dilute hydrochloric acid or dilute sulfuric acid with the concentration of 0.1 to 2 M; 0.001 to 5kg/ m 3 of corrosion inhibitor is added and is heated up to 25 to 50 DEG C; steel materials to be cleaned are added and are immersed for 1 to 3 hours; or compounded acid liquor as washing liquid is directly added to equipment to be cleaned. The green acid washing corrosion inhibitor is used for industrial acid washing of various kinds of steel and iron and the products thereof to avoid the general corrosion and the local corrosion of the steel and the iron. Compared with the existing acid washing corrosion inhibitor, the green acid washing corrosion inhibitor of the present invention has the advantages of low consumption, high corrosion inhibiting efficiency and powerful lasting effect. The green acid washing corrosion inhibitor is natural plant extracts, is nontoxic and harmless to environments and living beings, accords with the developing trend of the acid washing corrosion inhibitor and has a favorable application prospect.
Description
Technical field
The present invention relates to a kind ofly, belong to the inhibiter production technical field in order to prevent unnecessary general corrosion and local corrosive natural green restrainer and the application thereof in acid cleaning process of iron and steel and goods thereof.
Background technology
Carry out the oxide film that pickling can be removed steel surface with dilute sulphuric acid or dilute hydrochloric acid, this technology is widely used in the refining of iron and steel, clean the boiler, aspects such as the cleaning of heat exchanger.The generation that consumes and prevent local corrosion excessively of metal or acid in the acid cleaning process, adding inhibiter in acid is effective means commonly used.
In the restrainer of widespread use at present, mainly by inorganic and organic two big classes, these inhibiter are mostly got by chemosynthesis, wherein have must toxicity and environmental hazard for the part inhibiter, such as the inorganic inhibition compound that contains poisonous chromate, the discharging of some organophosphor compounds causes the eutrophication of water body etc.
From existing disclosed corrosion inhibitor formula patent, some compounds in some corrosion inhibitor product are synthetic complicated, cost an arm and a leg, and improved user's use cost, and economic benefit is relatively poor, a little less than the market competitiveness.
Therefore, develop new environmental protection, cheapness, wide material sources, non-harmful restrainer are the new directions of present inhibiter exploitation.
Summary of the invention
The object of the present invention is to provide a kind of natural green restrainer and application thereof, in order to prevent iron and steel and goods thereof unnecessary general corrosion and local corrosion in acid cleaning process.
Technical scheme of the present invention is: a kind of natural green restrainer, by extracting in the plants such as the Chinese coptis, golden cypress or Root of Chinese Barberry, it is characterized in that composed of the following components: by weight percentage, berberine hydrochloride 80%-98%, hydrochloric acid epiberberine 0.1%-10%, Jatrorrhizine chloride 0.1%-10%.The working concentration scope: pickle solution is dilute hydrochloric acid or dilute sulphuric acid, and concentration is 0.1-2M, adds Rhizoma Coptidis extract (inhibiter) 0.001kg/m
3-5kg/m
3, be warming up to 25-50 ℃, add steel to be cleaned, submergence 1-3h; Perhaps, gained solution is directly added equipment to be cleaned as scavenging solution, soaked 3-12 hour.
Principle of the present invention is: alkaloids such as Berberine have the isoquinoline 99.9 structure, and intramolecularly contains atom or atomic groups such as heterocycle, nitrogen, oxygen, can be adsorbed in steel surface effectively, plays corrosion inhibition.
The invention has the beneficial effects as follows:
(1) coptis plant origin of the present invention is extensive, and market quotes in 2004 is between 60-120 unit/kilogram, and extracting method is simple, calculates by 7% yield, and the extract price can be controlled in 800-1600 unit/kilogram, and cost is lower.
(2) inhibiter of the present invention is a natural plant extracts, and extract is nontoxic green matter, compares with the inhibiter of present chemosynthesis, there is not the environmental problem after the use, harmless to environment and biological nontoxic, meet the trend that restrainer develops, have a good application prospect.
(3) the present invention is used for the industrial acid-washed of all kinds of iron and steel and products thereof, can effectively suppress general corrosion and the local corrosion of metallic matrix in acid, compares with the restrainer of using always at present, it is low to have consumption, the inhibition efficiency height, the outstanding advantage that continuous action ability is strong can be used repeatedly.
Embodiment
The present invention carries out the lacing film zero-G test according to GB10124-88 " metallic substance laboratory uniform corrosion total immersion test method ", the test pickle solution is hydrochloric acid and sulfuric acid, concentration is 0.1-2M, test piece is the Q235 carbon steel, test temperature 25-50 ℃, experimental period 1-3h, the highest inhibition efficiency that test-results obtains is higher than 98%, is shown as inhibiter efficiently.
Inhibiter of the present invention can adopt following leaching process: it adopts Ethanol Method to extract by coptis plant, and concrete steps are as follows: the coptis is ground, add 95% ethanol, reflux half an hour, 1h is left standstill in cooling, filters, and filter cake repeats aforesaid operations 3 times; Merge 3 times gained filtrate, reduction vaporization; Add 1% acetic acid solution, heating, elimination impurity adds 37%HCl and makes it precipitation fully, filters, and filter cake is washed with dehydrated alcohol, and vacuum-drying gets final product.Described coptis plant can be the Chinese coptis, golden cypress or Root of Chinese Barberry.
Inhibiter of the present invention also can directly be got its three components and mix.
Embodiment 1
Inhibiter by weight percentage, berberine hydrochloride 98%, hydrochloric acid epiberberine 0.1%, Jatrorrhizine chloride 1.9%.
Pickle solution is a dilute hydrochloric acid, and concentration is 0.1M, and pickle solution consumption 100L adds inhibiter 30g, is warming up to 40 ℃, adds steel to be cleaned, and submergence 3h gets final product.
Embodiment 2
Inhibiter by weight percentage, berberine hydrochloride 96%, hydrochloric acid epiberberine 1%, Jatrorrhizine chloride 3%.
Pickle solution is a dilute hydrochloric acid, and concentration is 0.5M, and pickle solution consumption 100L adds inhibiter 45g, is warming up to 35 ℃, adds steel to be cleaned, and submergence 2h gets final product.
Embodiment 3
Inhibiter by weight percentage, berberine hydrochloride 94%, hydrochloric acid epiberberine 1%, Jatrorrhizine chloride 5%.
Pickle solution is a dilute sulphuric acid, and concentration is 1M, and pickle solution consumption 100L adds inhibiter 90g, is warming up to 30 ℃, adds steel to be cleaned, and submergence 2h gets final product.
Embodiment 4
Inhibiter by weight percentage, berberine hydrochloride 92%, hydrochloric acid epiberberine 5%, Jatrorrhizine chloride 3%.
Pickle solution is a dilute sulphuric acid, and concentration is 1M, and pickle solution consumption 100L adds inhibiter 120g, and gained solution is directly injected in equipment to be cleaned or the container as scavenging solution, soaks 6h and gets final product.
Embodiment 5
Inhibiter by weight percentage, berberine hydrochloride 90%, hydrochloric acid epiberberine 5%, Jatrorrhizine chloride 5%.
Pickle solution is a dilute sulphuric acid, and concentration is 0.5M, and pickle solution consumption 100L adds inhibiter 200g, and gained solution is directly injected in equipment to be cleaned or the container as scavenging solution, soaks 12h and gets final product.
Claims (3)
1, a kind of restrainer is characterized in that composed of the following components: by weight percentage, and berberine hydrochloride 80%～98%, hydrochloric acid epiberberine 0.1%～10%, Jatrorrhizine chloride 0.1%～10%.
2, according to the application of the described restrainer of claim 1, it is characterized in that: pickle solution is dilute hydrochloric acid or dilute sulphuric acid, and concentration is 0.1-2M, inhibiter is added in the pickle solution working concentration scope: 0.001kg/m
3-5kg/m
3, be warming up to 25-50 ℃, add steel to be cleaned, submergence 1-3h.
3, according to the application of the described restrainer of claim 1, it is characterized in that: pickle solution is dilute hydrochloric acid or dilute sulphuric acid, and concentration is 0.1-2M, adds density of corrosion inhibitor scope: 0.001kg/m in the pickle solution
3-5kg/m
3, gained solution is directly added equipment to be cleaned as scavenging solution, soak time 3～12 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100504334A CN100348779C (en) | 2004-09-17 | 2004-09-17 | Natural green acid washing slow corrosion agent and its use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100504334A CN100348779C (en) | 2004-09-17 | 2004-09-17 | Natural green acid washing slow corrosion agent and its use |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1749434A CN1749434A (en) | 2006-03-22 |
| CN100348779C true CN100348779C (en) | 2007-11-14 |
Family
ID=36605087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100504334A Expired - Fee Related CN100348779C (en) | 2004-09-17 | 2004-09-17 | Natural green acid washing slow corrosion agent and its use |
Country Status (1)
| Country | Link |
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| CN (1) | CN100348779C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100419123C (en) * | 2006-04-07 | 2008-09-17 | 中国科学院海洋研究所 | Acidic cleaner for carbon steel and applications |
| CN101787533B (en) * | 2010-03-18 | 2011-06-15 | 重庆大学 | Corrosion inhibitor for engine coolant and preparation method thereof |
| CN103757641B (en) * | 2014-01-21 | 2017-01-11 | 中国石油大学(华东) | Corrosion inhibition cleanser for sea water desalting plant and application thereof |
| WO2016093807A1 (en) * | 2014-12-09 | 2016-06-16 | Halliburton Energy Services, Inc. | Use of berberine as corrosion inhibitor in well operations |
| CN106400033B (en) * | 2016-11-11 | 2019-01-25 | 中北大学 | A kind of sunflower plate corrosion inhibiter extracting solution and its method for preparing pickling of metal solution |
| CN109023401B (en) * | 2018-09-28 | 2020-10-16 | 深圳市泽成丰新材料有限公司 | Environment-friendly degradable degreasing agent |
| CN113897615B (en) * | 2021-09-30 | 2023-06-02 | 河南省科学院能源研究所有限公司 | Zinc plating corrosion inhibitor in mixed acid medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1123343A (en) * | 1994-11-18 | 1996-05-29 | 刘威 | Scaling agent for water tank of automobile |
| CN1493713A (en) * | 2002-10-28 | 2004-05-05 | 启东尤希路化学工业有限公司 | Wet Levelling liquid |
-
2004
- 2004-09-17 CN CNB2004100504334A patent/CN100348779C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1123343A (en) * | 1994-11-18 | 1996-05-29 | 刘威 | Scaling agent for water tank of automobile |
| CN1493713A (en) * | 2002-10-28 | 2004-05-05 | 启东尤希路化学工业有限公司 | Wet Levelling liquid |
Non-Patent Citations (2)
| Title |
|---|
| 复配型绿色植物缓蚀剂对盐酸溶液中A3钢的缓蚀作用 张万友等.华北电力技术，第1期 2002 * |
| 天然高分子改性缓蚀剂的研究 汪晓军等.材料保护，第36卷第12期 2003 * |
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| Publication number | Publication date |
|---|---|
| CN1749434A (en) | 2006-03-22 |
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| SE01 | Entry into force of request for substantive examination | ||
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Granted publication date: 20071114 Termination date: 20100917 |