CN85106324A - Corrosion-resisting copper alloy for heat exchanger - Google Patents
Corrosion-resisting copper alloy for heat exchanger Download PDFInfo
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- CN85106324A CN85106324A CN85106324.1A CN85106324A CN85106324A CN 85106324 A CN85106324 A CN 85106324A CN 85106324 A CN85106324 A CN 85106324A CN 85106324 A CN85106324 A CN 85106324A
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- arsenic
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Abstract
Alloy of the present invention is to be suitable for doing the resistal that heat exchanger and condenser tube are used.It is to contain arsenic tin-brass alloy material with boron, aluminium as additive.Use in fresh water generation factory, have better erosion resistance, can adapt to the pollution fresh water environment than the arsenic one-ton brass that contains of common usefulness.
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 sea Army brass (U.S. claims 443 alloys), has stable operational characteristic, and the tubing made from it uses on fresh water generation factory condenser and has for many years, demonstrates Nai Erosion preferably.But because fresh water generation factory is widely distributed, the water coolant source of use is different, and also different to tubing De Fu Erosion degree, 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 the 1000PPM scope, and the water coolant that landlocked power plant uses to contain dissolved solid much be to surpass 1000PPM, often there are fouling, Erosion hole, 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 Nai Erosion performance.United States Patent (USP) 3627593 is to be that base adds Ni and reaches and improve corrosion proof purpose 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 No3,343-347 Page has delivered the report that is entitled as " additive is to the influence of brass dezincify speed under the high-temperature vacuum condition ", and this article has been studied the brass that contains Zn30% and has been added Fe, Co, Ni element role.People from Japan such as Otsu delivered the report that is entitled as " corrosion of copper alloy in high-temperature water and steam " in " Sumitomo light metal skill newspaper " January nineteen sixty, in January, 1964, April, July, October number, find that a spot of Fe, Ni, As, Sb, P add element raising Zn30% copper alloy solidity to corrosion is had certain effect.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 Page; 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 best composition 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%, AL, 0.02%, Zn and be surplus melts with low frequency induction furnace; Take Ban Lian Continued casting mode to water Cheng Zhu Ingot, 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:
But from table 1 See, 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.
From table 2 See, 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:
Do the metallographic polishing in the laboratory and soak Erosion took out tubing down in 28 months later in third power station installation, amplifies 200 times and observe these alloys of discovery and do not have rotten Erosion phenomenon generation, have that tangible bolt shape is molten separates rotten Erosion and contain arsenic one-ton brass (HSn70-1A).
4, laboratory Jing Tai Jin Erosion:
This alloy and HSn70-1A alloy pipe sample are respectively intercepted segment, and one reinstates the 3%NaCL aqueous solution connects 21 days (504 hours) of Continued immersion, 40 ± 1 ℃ of temperature, pH value is respectively 5.5 and 7.8 two kind of condition, take out then, wash Fu Erosion product, it is as follows to measure data results:
Table 3
The immersion liquid weight loss Ping Jun Fu Erosion speed Ping Jun Fu Erosion degree of depth
Alloy
PH value mg/cm
2G/m. hour mm/
5.5 this alloy 5.60 * 10
-311 * 10
-311 * 10
-3
HSn70-1A 7.58×10
-315×10
-315×10
-3
7.8 this alloy 7.49 * 10
-314 * 10
-315 * 10
-3
HSn70-1A 8.46×10
-317×10
-317×10
-3
As can be seen from Table 3, no matter pH value is high or low, and this alloy is all good than HSn70-1A He Jin Nai Erosion performance.
In a word, from above-mentioned four assays, this alloy uses under the different quality condition, and what its Erosion of Nai Fu performance 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, corrosion resistance is good; its application will be increasingly extensive; especially making condenser tube in fresh water generation brand-name computer group uses for a long time; corrosion-resistant and non-scaling can make power plant reduce and shut down number of times, reduces tubing and leaks; few plug-hole; be conducive to safeguard unit, prolong unit tubing service life, increase generated energy.
Claims (3)
1, a kind of Vulcan metal that is used for heat exchanger is arsenical one-ton brass.Be that Cu69.0-71.0%, Sn0.8-1.3%, its gold of AS (or Sb) 0.03-0.06% (weight percentage) are Zn, it is characterized in that addition element boron and aluminium in this alloy.
2, by the said alloy of claim 1, it is characterized in that the content 0.001-0.1% of boron (B) element, the content of aluminium (AL) element is 0.001-0.02%.
3, by claim 1 and 2 said alloys, it is characterized in that boron (B) element, aluminium (AL) element adds with the master alloy form.
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 true CN85106324A (en) | 1987-03-04 |
| CN1005156B 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) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
| CN101694359B (en) * | 2004-05-05 | 2012-09-12 | 卢瓦塔奥公司 | Heat transfer tube, heat exchanger assembly containing the heat transfer tube and method for manufacturing the heat exchanger |
| CN103451472A (en) * | 2012-06-04 | 2013-12-18 | 株式会社神户制钢所 | Titanium alloy material excellent in scale deposition inhibiting property and formability and a method of producing the same, as well as a heat exchanger or a seawater evaporator |
-
1985
- 1985-08-12 CN CN85106324.1A patent/CN1005156B/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694359B (en) * | 2004-05-05 | 2012-09-12 | 卢瓦塔奥公司 | Heat transfer tube, heat exchanger assembly containing the heat transfer tube and method for manufacturing the heat exchanger |
| 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 |
| 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 |
| 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 |
| CN103451472A (en) * | 2012-06-04 | 2013-12-18 | 株式会社神户制钢所 | Titanium alloy material excellent in scale deposition inhibiting property and formability and a method of producing the same, as well as a heat exchanger or a seawater evaporator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1005156B (en) | 1989-09-13 |
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