CN1005156B - Corrosion-resisting copper alloy for heat exchanger - Google Patents
Corrosion-resisting copper alloy for heat exchanger Download PDFInfo
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- CN1005156B CN1005156B CN85106324.1A CN85106324A CN1005156B CN 1005156 B CN1005156 B CN 1005156B CN 85106324 A CN85106324 A CN 85106324A CN 1005156 B CN1005156 B CN 1005156B
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- alloy
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- heat exchanger
- brass
- copper alloy
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Abstract
The present invention relates to alloy which is corrosion resistant copper alloy for a heat exchanger and a condenser pipe. The alloy is an alloy material which uses boron and aluminium as additives and contains arsenium, stannum and brass. The alloy is used in a power plant with freshwater; the corrosion resistance of the alloy is better than that of common alloy containing arsenium, stannum and brass, and the alloy can adapt to the environment with polluted freshwater.
Description
Alloy of the present invention is used as heat exchanger and condenser tubing.
The application of copper base alloy on heat exchanger obtained common recognition.Arsenical one-ton brass (trade mark Hsn70-1A) is called in the world and contains arsenic admiraltymetal (U.S. claims 443 alloys), has stable operational characteristic, the tubing made from it on fresh water generation factory condenser, use existing for many years, demonstrate solidity to corrosion preferably.But because fresh water generation factory is widely distributed, the water coolant source of use is different, and also different to the extent of corrosion of tubing, differ greatly work-ing life, directly influences the increase of generated energy.Therefore development is applicable to that more the new alloy material of the condenser tube of making heat exchanger is very necessary.
Contain arsenic one-ton brass (Hsn70-1A) and be used as fresh water generation factory condenser tubing.General restriction water quality contains dissolved solid less than * 000PPM scope, and the water coolant that landlocked power plant uses to contain dissolved solid much be to surpass 1000PPM, often there are fouling, pit, leakage phenomenon to take place, bring a lot of obstacles for the unit maintenance and the normal operation of power plant.
Chinese scholars has been noted this respect problem.Develop various copper-based alloy materials and improve corrosion resisting property.United States Patent (USP) 8627583 is to be that base interpolation Ni reaches the corrosion proof purpose of raising with Cu-Zn; United States Patent (USP) 3703367 is to be the alloy of base with Cu-Zn or to add Ti, Al or add Ni or method that Ti, Al, Ni add; United States Patent (USP) 3713814 is the methods of adding Pb, Ni, Mn, Al at Cu-Zn for base; United States Patent (USP) 4208708 be Cu-Zn be add Ni, Fe, Co, Mn in the basic alloy, As improves corrosion proof.Japan's " Metallkunde meeting will " 34 volume No3 have delivered the report that is entitled as " additive is to the influence of brass dezincify speed under the high-temperature vacuum condition " for 343～347 pages, and this article has been studied the brass that contains Zn30% and added Fe, Co, Ni element role.People such as Japan Otsu are in " Sumitomo light metal skill newspaper " January nineteen sixty.Delivered the report that is entitled as " corrosion of copper alloy in high-temperature water and steam " in January, 1964, April, July, October number, found that a spot of Fe, Ni, As, Sb, P add element and to improving Zn30% copper alloy solidity to corrosion certain effect arranged.Enumerated the 70-1-1+AS trade mark prolong that the arsenic one-ton brass adds that contains that certain factory makes in the article that China's Xian Thermal Power Engineering Research Institute is delivered in January, 1980 " condenser contains As brazed copper tube type approval test and sums up " (first draft) on 16,18,20 pages; Introduced the experiment situation of in containing the arsenic one-ton brass, adding Ni, Ti, Al element respectively in " condenser tube is chosen test in the polluted seawater " literary composition that Huabei Electric Power Experiment Inst. delivers in November, 1981.But, in all these documents, do not have one piece of document to relate to alloy of the present invention.
It is low that main purpose of the present invention provides a kind of cost, has the very copper alloy of high anti-corrosion, it has better corrosion resisting property than the arsenic tin brass tube that contains that is used in usually on the fresh water generation factory condenser, especially in use can form even, firm, bright surface film, non-scaling is corrosion-resistant, suitable equally in the fresh water that pollutes, very big practical value is arranged on energy industry.
(detailed description)
Alloy of the present invention is to be that boron (B) is added in basic containing in arsenic, the one-ton brass, aluminium (Al) element is formed with copper.Its optimal components is Cu69.0～71.0%, Sn0.8～1.3%, As(or Sb) 0.03～0.06%, B0.001～0.1%, Al0.001～0.02%(weight percentage, in full with), Zn is a surplus.
The preparation of this alloy method is routinely carried out, and adds B, Al, Cu, master alloy during founding, and qualified ingot casting becomes the blank specification earlier through hot-work, is undertaken by the annealing that hockets, cold pressure working method then, until final required specification.
This alloy manufacture craft and advantage can be easy to find out from following Example.
Example:
The alloy that contains Cu69.41%, Sn0.97%, As0.0418%, B0.028%, Al0.02%, Zn and be surplus melts with low frequency induction furnace, take the direct chill casting mode to water into ingot casting, through hot cold working and necessary annealing process, make tubing finished product φ 25 * 1mm, carry out oil removing, degreasing, annealing, inspection then.
This alloy finished product of making, the arsenic one-ton brass tubing that contains with common usefulness carries out industrialness installation test in the fresh water generation factory of three different quality conditions, test through nearly triennium, with laboratory static immersing comparison of test results, it is fine to demonstrate correspondence, the consistent corrosion resisting property of finding out it surpasses and contains arsenic one-ton brass tubing, and it is as follows repeatedly to take out the pipe check result in power plant:
1. macrographic examination:
As seen from Table 1, this alloy is actual installation operation under the different quality condition, and the result can form firm uniform bright protective membrane, and non-scaling is anti-corrosion than the HSn70-1A pipe under the same conditions.
2. service check:
From table 2 finding, although this alloy differs in length in power plant's installation duration of service, mechanical property changes less, and HSn70-1A changes than this alloy greatly.
3. metaloscopy:
Tubing under taking out later in 28 months in the installation of third power station is done metallographic polishing etch in the laboratory, amplify 200 times of observations and find that this alloy does not have corrosion phenomenon to take place, and has tangible bolt shape dissolved corrosion and contain arsenic one-ton brass (HSn70-1A).
4. the static etch in laboratory:
This alloy and HSn70-1A alloy pipe sample are respectively intercepted segment, reinstate 3%NaCl aqueous solution successive soaking 21 days (504 hours), 40 ± 1 ℃ of temperature, the pH value is respectively 5.5 and 7.8 two kind of condition, take out then, wash corrosion product, it is as follows to measure data results:
As can be seen from Table 3, no matter the pH value is high or low, and this alloy all can be good than HSn70-1A alloy corrosion resistance.
In a word, from above-mentioned four assays, this alloy uses under the different quality condition, and what its corrosion resistance nature all obviously was better than common usefulness contains arsenic one-ton brass HSn(70-A1).
Because this alloy has the advantages that thermal conductivity is good, solidity to corrosion is good; its application will be increasingly extensive; especially in fresh water generation brand-name computer group, do the condenser tube life-time service; corrosion-resistant and non-scaling can make power plant reduce and shut down number of times, reduces tubing and leaks; few plug-hole; help safeguarding unit, prolong unit tubing work-ing life, increase generated energy.
Table 1
Table 2
Table 3
Claims (1)
1, a kind of Vulcan metal that is used for heat exchanger is characterized in that containing gold and contains (weight) Cu69.0～71.0%, Sn0.8～1.3%, As(or Sb) 0.03～0.06%, B0.001～0.1%, A0.001～0.02%, Zn surplus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85106324.1A CN1005156B (en) | 1985-08-12 | 1985-08-12 | Corrosion-resisting copper alloy for heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85106324.1A CN1005156B (en) | 1985-08-12 | 1985-08-12 | Corrosion-resisting copper alloy for heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85106324A CN85106324A (en) | 1987-03-04 |
| CN1005156B true CN1005156B (en) | 1989-09-13 |
Family
ID=4795010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85106324.1A Expired CN1005156B (en) | 1985-08-12 | 1985-08-12 | Corrosion-resisting copper alloy for heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1005156B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE602005026527D1 (en) * | 2004-05-05 | 2011-04-07 | Luvata Oy | HEAT TRANSFER TUBE MADE FROM TIN BRASS ALLOY |
| CN100366772C (en) * | 2006-03-28 | 2008-02-06 | 江阴新华宏铜业有限公司 | Seamless copper alloy pipe with excellent anti-corrosion performance for heat exchanger and preparation method thereof |
| CN102345029A (en) * | 2011-06-27 | 2012-02-08 | 苏州方暨圆节能科技有限公司 | Copper alloy material for radiator fins |
| CN102345030A (en) * | 2011-06-27 | 2012-02-08 | 苏州方暨圆节能科技有限公司 | Antibacterial and corrosion resistant heat exchanger copper pipe |
| CN102345028A (en) * | 2011-06-27 | 2012-02-08 | 苏州方暨圆节能科技有限公司 | Copper alloy material of heat exchanger plate |
| JP6085211B2 (en) * | 2012-06-04 | 2017-02-22 | 株式会社神戸製鋼所 | Titanium alloy material excellent in scale adhesion control and formability, its manufacturing method, and heat exchanger or seawater evaporator |
-
1985
- 1985-08-12 CN CN85106324.1A patent/CN1005156B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85106324A (en) | 1987-03-04 |
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