CN104775050A - Brine corrosion resistance copper alloy and preparation process thereof - Google Patents
Brine corrosion resistance copper alloy and preparation process thereof Download PDFInfo
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- CN104775050A CN104775050A CN201510153376.0A CN201510153376A CN104775050A CN 104775050 A CN104775050 A CN 104775050A CN 201510153376 A CN201510153376 A CN 201510153376A CN 104775050 A CN104775050 A CN 104775050A
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Abstract
The invention relates to brine corrosion resistance copper alloy and a preparation process thereof, and particularly relates to copper materials in the field of sea water desalination. The copper alloy is prepared from the following components in percentage by weight: 0.01-0.05 percent of phosphorus, 0.001-0.1 percent of yttrium, less than 1 percent of impurities and the balance of copper. The preparation process comprises the following steps: (1) melting electrolytic copper, and covering charcoal to insulate air; (2) adding phosphor-copper master alloy to perform preliminary deoxidation; (3) adding copper-yttrium master alloy, and performing electromagnetic stirring; (4) casting into a preheated iron mold to obtain a copper alloy ingot. In the brine corrosion resistance copper alloy, the corrosion speed in the 3.5% sodium chloride solution is remarkably reduced, and the corrosion resistance in brine is improved by 20-50 percent in comparison with that of pure copper.
Description
Technical field
The invention belongs to copper alloy field, particularly relate to copper alloy and the preparation technology of the corrosion of a kind of salt water resistance.
Background technology
Copper and alloy thereof, owing to having good salt water resistance corrosive nature, are widely used in the pipeline etc. of the prolong of oceanographic equipment and Coastal Power Plant and interchanger, sea water desalting equipment.But in practical application, due to the existence of seawater scouring, microorganism and unrelieved stress, often make Copper and its alloy parts lose efficacy because of corrosion within a short period of time.At present at copper alloy mainly aluminum brass, one-ton brass, iron white copper and the Alpaka etc. that briny environment uses.Wherein aluminum brass and one-ton brass mechanical property poor, and there is serious dealloying corrosion; Iron white copper and Alpaka hardness high, the difficulty being processed into device is large, causes production cost higher.
The Chinese patent literature of application number 201210305708.9 refer to a kind of Vulcan metal; aluminum brass basis adds scandium and mishmetal lanthanum, cerium; containing a certain amount of zinc in this alloy; inevitably there is Dezincification corrosion; and scandium belongs to strategic element, expensive, Rare Earth Lanthanum, cerium are the very active 2 kinds of rare earth elements of chemical property; in alloy melting process, burn out rate is higher, is difficult to the alloy obtaining stabilizing component.The Chinese patent literature of application number 201210471075.9 refer to an Albatra metal-, containing alloying element aluminium, zinc, tin etc. that some electropotentials are lower than copper in this alloy, in corrosive medium, inevitably there is micro-galvanic corrosion, improve corrosion speed, limit its application.
Summary of the invention
For the defect that existing copper alloy material exists, the object of this invention is to provide a kind of salt water resistance corrosive nature excellent and there is copper alloy and the preparation technology of excellent machinability.
The copper alloy of salt water resistance corrosion provided by the invention, its composition is by percentage, and comprise phosphorus 0.01-0.05%, yttrium 0.001-0.1%, foreign matter content is less than 1%, and surplus is copper.
The preparation technology of above-mentioned copper alloy, comprises the steps:
1. melt electrolytic copper, charcoal covers, isolated air;
2. add copper phosphorus master alloy, carry out pre-deoxidation;
3. copper yttrium master alloy is added, induction stirring;
4. be cast in preheated swage, obtain copper alloy casting ingot.
Described step 1. in, in electrolytic copper, copper content is at 99.90-99.99%, and temperature of fusion is at 1100-1250 DEG C, and charcoal needs before addition at 300-600 DEG C of preheating 0.5-1 hour.
Described step 2. in, in copper phosphorus master alloy, phosphorus content is at 10-15%.
Described step 3. in, in copper yttrium master alloy, yttrium content is at 8-12%, induction stirring 10-20 minute.
Described step 4. in, swage needs through 200-400 DEG C of preheating 0.5-1 hour before casting, and copper liquid will leave standstill 20-40 minute before casting.
Copper alloy of the present invention has higher salt water resistance corrosive nature, high hardness and wear resisting property, high tensile strength and unit elongation and good processing characteristics.
The present invention relates to copper alloy and the preparation technology of the corrosion of a kind of salt water resistance, particularly relate to the copper material being applied in field of seawater desalination.This alloying constituent percentage, comprises phosphorus 0.01-0.05%, yttrium 0.001-0.1%, and foreign matter content is less than 1%, and surplus is copper.The concrete steps of this alloy preparation technology are as follows: 1. melt electrolytic copper, and charcoal covers, isolated air; 2. add copper phosphorus master alloy, carry out pre-deoxidation; 3. copper yttrium master alloy is added, induction stirring; 4. be cast in preheated swage, obtain copper alloy casting ingot.The erosion rate of this alloy in 3.5% sodium chloride solution obviously declines, and the corrosion resistance nature in salt solution comparatively fine copper improves 20-50%.
The object that in the present invention, charcoal covers is in order to isolated air, prevents copper melts oxygen uptake.The object phosphorated is pre-deoxidation on the one hand, can improve mobility and the weldability of alloy on the other hand.The object adding yttrium is in order to degree of depth deoxidation, sulphur removal and some metallic impurity, can also change the pattern of inclusion in copper, reduces the stress concentration in the course of processing, improves the salt water resistance corrosive nature of alloy.It is burn out rate in order to reduce phosphorus, yttrium that phosphorus, yttrium all add in the mode of master alloy, increases its specific absorption in copper.
Accompanying drawing explanation
Fig. 1 is the galvanic corrosion shape appearance figure of copper alloy of the present invention in 3.5%NaCl solution.In figure, corrosion surface is smooth, does not occur obvious spot corrosion and other corrosion condition, and this illustrates that copper alloy of the present invention has good salt water resistance corrosive nature.
Fig. 2 is the galvanic corrosion shape appearance figure of as cast condition fine copper in 3.5%NaCl solution.Occur in figure manyly differing in size and having the point corrosion pit of certain depth, the appearance of point corrosion pit accelerates the corrosion of fine copper in 3.5%NaCl solution, and this illustrates that the salt water resistance corrosive nature of fine copper is poor.
Embodiment
Below in conjunction with embodiment, the present invention is described in detail, but protection domain is not by this restriction.
The preparation technology of the copper alloy of embodiment 1 one kinds of salt water resistance corrosion, step is:
1. melting 9.93kg copper content at 1150 DEG C is the electrolytic copper of 99.92%, covers with the charcoal of drying 0.5 hour through 400 DEG C, isolated air;
2. add the copper phosphorus master alloy 22 grams of phosphorus content 12%, carry out pre-deoxidation;
3. add yttrium content 10% copper yttrium master alloy 36 grams, induction stirring 12 minutes;
4. copper liquid left standstill after 25 minutes, was cast in 300 DEG C of preheatings swage of 0.5 hour, obtained copper alloy casting ingot.
The performance index of this copper alloy are in table 1.
The preparation technology of the copper alloy of embodiment 2 one kinds of salt water resistance corrosion, step is:
1. melting 10.05kg copper content at 1180 DEG C is the electrolytic copper of 99.95%, covers with the charcoal of drying 0.7 hour through 450 DEG C, isolated air;
2. add the copper phosphorus master alloy 30 grams of phosphorus content 14%, carry out pre-deoxidation;
3. add yttrium content 9% copper yttrium master alloy 51 grams, induction stirring 15 minutes;
4. copper liquid left standstill after 30 minutes, was cast in 350 DEG C of preheatings swage of 0.8 hour, obtained copper alloy casting ingot.
The performance index of this copper alloy are in table 1.
The preparation technology of the copper alloy of embodiment 3 one kinds of salt water resistance corrosion, step is:
1. melting 10.26kg copper content at 1210 DEG C is the electrolytic copper of 99.97%, covers with the charcoal of drying 1 hour through 500 DEG C, isolated air;
2. add the copper phosphorus master alloy 38 grams of phosphorus content 13%, carry out pre-deoxidation;
3. add yttrium content 11% copper yttrium master alloy 77 grams, induction stirring 18 minutes;
4. copper liquid left standstill after 35 minutes, was cast in 400 DEG C of preheatings swage of 1 hour, obtained copper alloy casting ingot.
The performance index of this copper alloy are in table 1.
The copper alloy of a kind of salt water resistance corrosion of gained of the present invention, percentage, comprises phosphorus 0.01-0.05%, yttrium 0.01-0.1%, and foreign matter content is less than 0.5%, and surplus is copper.
Table 1
Fig. 1 is the galvanic corrosion shape appearance figure of copper alloy of the present invention in 3.5%NaCl solution.In figure, corrosion surface is smooth, does not occur obvious spot corrosion and other corrosion condition, and this illustrates that copper alloy of the present invention has good salt water resistance corrosive nature.Fig. 2 is the galvanic corrosion shape appearance figure of as cast condition fine copper in 3.5%NaCl solution.Occur in figure manyly differing in size and having the point corrosion pit of certain depth, the appearance of point corrosion pit accelerates the corrosion of fine copper in 3.5%NaCl solution, and this illustrates that the salt water resistance corrosive nature of fine copper is poor.
Of the present invention completing has benefited from education department of Shandong Province funded projects.
Claims (10)
1. a copper alloy for salt water resistance corrosion, it is characterized in that, percentage, comprise phosphorus 0.01-0.05%, yttrium 0.001-0.1%, foreign matter content is less than 1%, and surplus is copper.
2. the preparation technology of copper alloy according to claim 1, is characterized in that, comprises the following steps:
1. melt electrolytic copper, charcoal covers, isolated air;
2. add copper phosphorus master alloy, carry out pre-deoxidation;
3. copper yttrium master alloy is added, induction stirring;
4. be cast in preheated swage, obtain copper alloy casting ingot.
3. the preparation technology according to claims 2, is characterized in that, step 1. in, in electrolytic copper, copper content is at 99.90-99.99%.
4. the preparation technology according to claims 2, is characterized in that, step 1. in, charcoal need at 300-600 DEG C of preheating 0.5-1 hour.
5. the preparation technology according to claims 2, is characterized in that, step 1. in, the temperature of fusion of electrolytic copper is at 1100-1250 DEG C.
6. the preparation technology according to claims 2, is characterized in that, step 2. in, in copper phosphorus master alloy, phosphorus content is at 10-15%.
7. the preparation technology according to claims 2, is characterized in that, step 3. in, in copper yttrium master alloy, yttrium content is at 8-12%.
8. the preparation technology according to claims 2, is characterized in that, step 3. in, induction stirring 10-20 minute.
9. the preparation technology according to claims 2, is characterized in that, step 4. in, swage needs through 200-400 DEG C of preheating 0.5-1 hour before casting.
10. the preparation technology according to claims 2, is characterized in that, step 4. in, copper liquid will leave standstill 20-40 minute before casting.
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| CN201510153376.0A CN104775050B (en) | 2015-03-31 | 2015-03-31 | Brine corrosion resistance copper alloy and preparation process thereof |
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| CN201510153376.0A CN104775050B (en) | 2015-03-31 | 2015-03-31 | Brine corrosion resistance copper alloy and preparation process thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105296790A (en) * | 2014-08-04 | 2016-02-03 | 丁义存 | Rare earth nano phosphor-copper alloy and preparation method thereof |
| CN110106374A (en) * | 2018-12-22 | 2019-08-09 | 北京航空航天大学 | A method of high-purity high temperature alloy is prepared using material is returned |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101429601A (en) * | 2008-12-16 | 2009-05-13 | 四川鑫炬矿业资源开发股份有限公司 | Tellurium copper alloy material for electric power industry and method for producing the same |
| CN102978433A (en) * | 2012-11-19 | 2013-03-20 | 宁波福士汽车部件有限公司 | Copper alloy pipe for air conditioner |
-
2015
- 2015-03-31 CN CN201510153376.0A patent/CN104775050B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101429601A (en) * | 2008-12-16 | 2009-05-13 | 四川鑫炬矿业资源开发股份有限公司 | Tellurium copper alloy material for electric power industry and method for producing the same |
| CN102978433A (en) * | 2012-11-19 | 2013-03-20 | 宁波福士汽车部件有限公司 | Copper alloy pipe for air conditioner |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105296790A (en) * | 2014-08-04 | 2016-02-03 | 丁义存 | Rare earth nano phosphor-copper alloy and preparation method thereof |
| CN110106374A (en) * | 2018-12-22 | 2019-08-09 | 北京航空航天大学 | A method of high-purity high temperature alloy is prepared using material is returned |
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| CN104775050B (en) | 2017-05-03 |
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