CN105417737B - Composite corrosion inhibitor for closed loop sofe water water - Google Patents
Composite corrosion inhibitor for closed loop sofe water water Download PDFInfo
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- CN105417737B CN105417737B CN201511008164.XA CN201511008164A CN105417737B CN 105417737 B CN105417737 B CN 105417737B CN 201511008164 A CN201511008164 A CN 201511008164A CN 105417737 B CN105417737 B CN 105417737B
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- water
- closed loop
- corrosion inhibitor
- composite corrosion
- loop sofe
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/12—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen
- C02F5/125—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen combined with inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/08—Corrosion inhibition
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The present invention relates to a kind of composite corrosion inhibitors for closed loop sofe water water, belong to water-treatment technology field.Composite corrosion inhibitor of the present invention for closed loop sofe water water, it is made of the raw material of following weight percentage: alkanolamide 5~15%, sodium molybdate 10%~25%, sodium carbonate 20%~50%, ascorbic acid 10%~30%, hexamethylenetetramine 8%~20%, azole derivative 5%~10%, sodium hydroxide 5%~10%.Composite corrosion inhibitor of the present invention for closed loop sofe water water, corrosion mitigating effect is good, and the environmentally harmful ingredient such as not phosphorous, heavy metal is a kind of environment-friendly corrosion inhibitor.
Description
Technical field
The present invention relates to a kind of composite corrosion inhibitors for closed loop sofe water water, belong to water-treatment technology field.
Background technique
By in natural water calcium, magnesium plasma removal after water be known as softened water, softened water because its hardness is low, non-scaling
Feature is widely used in the soft water closed circulatings water system such as blast furnace, air-conditioning.
Contain Ca in natural water2+、Mg2+Etc. hardness composition, can metal surface deposit to be formed one layer it is not so dense, very
Thin protective layer reduces the corrosive substances such as the oxygen in water with the contact of metal, therefore reduces to corrosion of metal.And soften
Water all eliminates the hardness in water, protective layer cannot be re-formed, while being not easy fouling, it is easier to cause the tight of system
Heavy corrosion.
Most common solution is exactly to add corrosion inhibiter both at home and abroad at present, the corrosion inhibiter such as nitrite, chromate because
Its low in cost, excellent effect is widely applied, but since there are serious problem of environmental pollutions for it, by more and more
Limitation.And higher cost when the exclusive use of the corrosion inhibiter such as molybdate, tungstates, there is also various for the exclusive use of other corrosion inhibiter
Problem.Therefore developing efficient, environmentally friendly, the inexpensive compound corrosion inhibitor of one kind is current closed loop sofe water water process medicine
The developing direction of agent.
Summary of the invention
The object of the present invention is to provide a kind of composite corrosion inhibitors for closed loop sofe water water, and corrosion mitigating effect is good, no
The environmentally harmful ingredient such as phosphorous, heavy metal is a kind of environment-friendly corrosion inhibitor.
The composite corrosion inhibitor for closed loop sofe water water, is made: alkanol of the raw material of following weight percentage
Amide 5-15%, sodium molybdate 10%-25%, sodium carbonate 20%-50%, ascorbic acid 10%-30%, hexamethylenetetramine 8%-20%, azole
Derivative 5%-10%, sodium hydroxide 5%-10%.
Preferably, it is made of the raw material of following weight percentage: alkanolamide 8-12%, sodium molybdate 15%-20%, carbonic acid
Sodium 25%-40%, ascorbic acid 15%-25%, hexamethylenetetramine 10%-15%, benzotriazole 8%-10%, sodium hydroxide 5%-
10%。
The sodium molybdate is Sodium Molybdate Dihydrate.
The azole derivative is the one or more of benzotriazole, methylbenzotriazole or mercapto benzothiazole.
When using the composite corrosion inhibitor, adding concentration is 50-80mg/l.
The composite corrosion inhibitor is suitable for the closed loop sofe water water system that material is carbon steel, stainless steel or copper.
The property and effect of related component are as follows in formula of the present invention:
Benzotriazole: being white or Bluish white acicular crystal, can form covalent bond and coordinate bond with copper atom, mutually hands over
For at key-like condensate, multilayer proofing film is formed on copper surface, the surface of copper is made not generate electrochemical reaction, to have fabulous
Corrosion inhibition, similarly there is preferable corrosion protection to act in the metal materials such as aluminium, steel.
Alkanolamide: white solid is nonionic surfactant, can form one layer of adsorbed film in metal surface, prevent
Metal erosion.
Sodium molybdate: for white diamond crystalline solid.Sodium molybdate category anodic oxidation membranous type corrosion inhibiter forms one layer of Asia in anode
The high Fe Mo complex oxide passivating film of iron-and play slow releasing function, compounding with benzotriazole etc. can be improved corrosion mitigating effect.
Hexamethylenetetramine: molecular formula (CH2) N4, white to light yellow crystalline powder is polymer, can
It is particularly well adsorbed in metal surface, forms layer protecting film, inhibits corrosion of metal.
Compared with prior art, the invention has the following advantages:
(1) formula components have obvious synergistic function, and can generate the mixed types such as oxidation film, precipitation membrane, adsorbed film
Protective layer；
(2) the environmentally harmful ingredient such as not phosphorous, heavy metal in formula, is a kind of environment-friendly corrosion inhibitor；
(3) this formula dosage is small, at low cost, is suitable for various closed loop sofe water water systems.
Specific embodiment
Below with reference to embodiment, the present invention is further illustrated, but it is not intended to limit implementation of the invention.
Embodiment 1
The composite corrosion inhibitor for closed loop sofe water water, is made of the raw material of following weight percentage:
Alkanolamide 10%, sodium molybdate 16%, sodium carbonate 32%, ascorbic acid 18%, hexamethylenetetramine 14%, benzene three nitrogen of a pair of horses going side by side
Azoles 5%, sodium hydroxide 5%.
Crystallizer soft water sealing and circulating water system like a chain of pearls or a string of beads, moisturizing are ion exchange resin softened water, using this formula, dosing
Concentration is 50mg/l.Dosing is run 2 years, corrosion of carbon steel lacing film is hung in circulation, the detection of the every two moon is primary, during which
Corrosion rate is detected between 0.0085-0.027mma, lacing film any surface finish, no spot corrosion complies fully with GB50050-2007 work
Industry Design of Circulation Cooling Water Treatment code requirement.
Embodiment 2
The composite corrosion inhibitor for closed loop sofe water water, is made of the raw material of following weight percentage:
Alkanolamide 8%, sodium molybdate 20%, sodium carbonate 30%, ascorbic acid 15%, hexamethylenetetramine 12%, methylbenzene a pair of horses going side by side three
Nitrogen azoles 8%, sodium hydroxide 7%.
1080m3Blast furnace uses closed loop sofe water water system, and moisturizing is ion exchange resin softened water, is formulated using this,
Adding consistency is 65mg/l.Dosing is run 4 years, and carbon steel lacing film is hung in circulation, and it is equal monthly to detect a corrosion rate
Between 0.0042-0.015mma, lacing film any surface finish, no spot corrosion, system run all right complies fully with GB50050-2007 work
Industry Design of Circulation Cooling Water Treatment code requirement.
Embodiment 3
The composite corrosion inhibitor for closed loop sofe water water, is made of the raw material of following weight percentage:
Alkanolamide 5%, sodium molybdate 25%, sodium carbonate 20%, ascorbic acid 10%, hexamethylenetetramine 20%, sulfydryl benzene a pair of horses going side by side thiophene
Azoles 10%, sodium hydroxide 10%.
1080m3Blast furnace uses closed loop sofe water water system, and moisturizing is reverse osmosis desalination water, and using this formula, dosing is dense
Degree is 70mg/l.Dosing is run 3 years, and carbon steel lacing film is hung in circulation, is monthly detected a corrosion rate and is existed
Between 0.014-0.032mma, lacing film any surface finish, no spot corrosion, system run all right, comply fully with GB50050-2007 industry
Design of Circulation Cooling Water Treatment code requirement.
Embodiment 4
The composite corrosion inhibitor for closed loop sofe water water, is made of the raw material of following weight percentage:
Alkanolamide 15%, sodium molybdate 10%, sodium carbonate 40%, ascorbic acid 17%, hexamethylenetetramine 8%, benzotriazole
2%, mercapto benzothiazole 3%, sodium hydroxide 5%.
Central air-conditioning uses closed loop sofe water water system, and moisturizing is reverse osmosis desalination water, using this formula, adding consistency
For 80mg/l.Dosing is run 2 years, and carbon steel lacing film is hung in circulation, monthly detects a corrosion rate in 0.009-
Between 0.030mma, lacing film any surface finish, no spot corrosion, it is cold to comply fully with GB50050-2007 industrial cycle system run all right
But water process design specification requirement.
Claims (4)
1. a kind of composite corrosion inhibitor for closed loop sofe water water, it is characterised in that by the raw material system of following weight percentage
At: alkanolamide 5-15%, sodium molybdate 10%-25%, sodium carbonate 20%-50%, ascorbic acid 10%-30%, hexamethylenetetramine 8%-
20%, azole derivative 5%-10%, sodium hydroxide 5%-10%；
When using the composite corrosion inhibitor, adding concentration is 50-80mg/l；
Azole derivative is the one or more of benzotriazole, methylbenzotriazole or mercapto benzothiazole.
2. the composite corrosion inhibitor according to claim 1 for closed loop sofe water water, it is characterised in that by following weight
The raw material of percentage composition is made: alkanolamide 8-12%, sodium molybdate 15%-20%, sodium carbonate 25%-40%, ascorbic acid 15%-25%,
Hexamethylenetetramine 10%-15%, benzotriazole 8%-10%, sodium hydroxide 5%-10%.
3. the composite corrosion inhibitor according to claim 1 or 2 for closed loop sofe water water, it is characterised in that: sodium molybdate
For Sodium Molybdate Dihydrate.
4. the composite corrosion inhibitor according to claim 1 or 2 for closed loop sofe water water, it is characterised in that: described
Composite corrosion inhibitor is suitable for the closed loop sofe water water system that material is carbon steel, stainless steel or copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201511008164.XA CN105417737B (en) | 2015-12-29 | 2015-12-29 | Composite corrosion inhibitor for closed loop sofe water water |
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| CN201511008164.XA CN105417737B (en) | 2015-12-29 | 2015-12-29 | Composite corrosion inhibitor for closed loop sofe water water |
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| Publication Number | Publication Date |
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| CN105417737A CN105417737A (en) | 2016-03-23 |
| CN105417737B true CN105417737B (en) | 2019-02-26 |
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| CN107162225B (en) * | 2017-05-23 | 2021-01-08 | 北京能泰高科环保技术股份有限公司 | Corrosion inhibitor for closed soft water circulating cooling water system, method and application |
| CN113716708A (en) * | 2021-09-13 | 2021-11-30 | 大连理工大学 | Descaling agent for inner wall of titanium tube of condenser |
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| US7172699B1 (en) * | 2004-10-13 | 2007-02-06 | Eimco Water Technologies Llc | Energy efficient wastewater treatment for nitrogen and phosphorus removal |
| CN101928075B (en) * | 2010-08-30 | 2011-12-21 | 蓝星环境工程有限公司 | Closed-type circulating cooling water system inhibiter and preparation method thereof |
| CN103130359A (en) * | 2013-03-21 | 2013-06-05 | 柳州市盛鹏源环保科技有限公司 | Corrosion and scale inhibition method for soft water closed circulation system |
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