CN104762632A - Aluminum alloy forging surface cleaning method - Google Patents
Aluminum alloy forging surface cleaning method Download PDFInfo
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- CN104762632A CN104762632A CN201510216397.2A CN201510216397A CN104762632A CN 104762632 A CN104762632 A CN 104762632A CN 201510216397 A CN201510216397 A CN 201510216397A CN 104762632 A CN104762632 A CN 104762632A
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- aluminum alloy
- forge piece
- cleaning
- alloy forge
- pickling
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/12—Light metals
- C23G1/125—Light metals aluminium
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/22—Light metals
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- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
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- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses an aluminum alloy forging surface cleaning method. According to the method, an aluminum alloy forging containing carbon particles on the surface is cleaned in the following steps of primary acid pickling, primary alkali washing, brightening, soaking in cutting liquid, secondary alkali washing, secondary acid pickling, soaking in water and drying. In the technology, soaking in the cutting liquid is needed so that the settlement speed of the carbon particles can be increased, and work efficiency is improved. Meanwhile, a compact lubricating film can be formed on the surface of the aluminum alloy forging to prevent the surface from being oxidized. Mixed acid of nitric acid and phosphoric acid is selected in the primary acid pickling, so that the smoothness of the surface of the cleaned aluminum alloy forging is good, and the dirt removing capacity is strong. The technology improves production efficiency, reduces production cost, and is easy and mature in operation and suitable for large-scale application and popularization.
Description
Technical field
The present invention relates to aluminum alloy forge piece cleaning technique field, refer to a kind of method for cleaning surface of aluminum alloy forge piece especially.
Background technology
Along with becoming increasingly conspicuous of energy shortage and problem of environmental pollution, energy-saving and emission-reduction become the inherent requirement of socio-economic development.Adapt with it, for transportation industry, especially the loss of weight demand of automobile is day by day urgent, and a large amount of aluminum alloy spare part obtains to be paid attention to and application.Aluminum alloy spare part for specific demand need adopt forging molding, not only can alleviate own wt but also can reach higher intensity.Need at forging die cavity inner-wall spraying lubricant in metal forging process, while reducing frictional coefficient, also can prevent metal from sticking together with mould in forging and stamping process.Mainly apply to oil base oildag in aluminum alloy forged process, this lubricant, primarily of lubricating oil and graphite composition, also the demoulding also can prevent the oxidation of forging smoothly like this while obtaining preferably lubricant effect.But adopt oil base oildag a to exist difficult problem that one is difficult to radical cure, that is exactly that the graphite carbon granule formed of at high temperature vaporizing easily adheres to aluminum alloy forge piece surface, adds greasy dirt on Forging equipment and easily forms fine and close black greasy dirt film.Traditional steel brush or ball blast clean metal surface, for easy damaged forging surface softer aluminium alloy, also can embed forging surface by graphite granule, cannot clean up especially.Thus, the cleaning problem of the surface particles of aluminum alloy forge piece is one of key issue of limit product exploitation.
Have in prior art in the method for the removal surface blot adopting the techniques such as alkali cleaning, pickling, hot-water soak, easily cause again corrosion aluminium alloy top layer, cause aluminum alloy surface glossiness not good, or the problems such as particle is not thorough are removed in cleaning.
In view of this, one thoroughly can remove aluminum alloy forge piece surface particles thing, does not simultaneously corrode aluminum alloy surface further, and it is just necessary to reduce the appearance of purging method of aluminium alloy true qualities after washing.
Summary of the invention
The present invention proposes a kind of method for cleaning surface of aluminum alloy forge piece, solves in prior art and aluminum alloy surface particulate matter cannot remove not thoroughly, corrodes aluminum alloy surface and wash the not good problem of rear glossiness.
Technical scheme of the present invention is achieved in that
A method for cleaning surface for aluminum alloy forge piece, comprising:
Aluminum alloy forge piece surface being contained carbon granule carries out the cleaning of following steps;
First pickling;
First alkali cleaning;
Light;
Soak in cutting fluid;
Second alkali cleaning;
Second pickling;
Soak in water; And
Dry.
As preferred technical scheme, described cutting fluid is aluminum alloy cutting fluid, in commercially available aluminum alloy cutting fluid cleaning process all used in the present invention.Use aluminum alloy cutting fluid to soak aluminum alloy forge piece in the present invention, the carbon granule rapid subsidence on aluminum alloy forge piece surface can be made, prevent surface oxidation at the lubricant film of aluminum alloy forge piece surface production densification simultaneously; Therefore this step is antirust and clean committed step.And not containing this step in the cleaning of prior art, but directly carry out pure water immersion, the carbon granule settling velocity on such aluminum alloy forge piece surface is slow, length consuming time, is also difficult to form the lubricant film producing provide protection.Therefore, use process that cutting fluid is soaked compared with prior art, efficiency is high, antirust and cleaning effect is better.
As preferred technical scheme, the technique of described first pickling is as follows: adopt the mixing acid of the phosphoric acid solution of mass percent concentration 40-60% and the salpeter solution of mass percent concentration 5-10% to clean described aluminum alloy forge piece, temperature controls at 80-110 DEG C, cleans to the surface exposure carbon granule of described aluminum alloy forge piece.If use single acid to carry out cleaning or remove this mixing acid in this process to clean, the smooth finish on the aluminum alloy forge piece surface after general cleaning is not good.The scavenging period of this process is generally 3-5min, as long as can see aluminum alloy forge piece surface exposure carbon granule.The pickling of this step has an even effect, the greasy dirt on a removal aluminum alloy forge piece surface, the carbon granule on two exposed aluminium alloy forged piece surfaces.
As preferred technical scheme, the volume ratio of described phosphoric acid solution and described salpeter solution is 1:1.
As preferred technical scheme, the technique of described first alkali cleaning is as follows: the described aluminum alloy forge piece of NaOH solution cleaning after the first pickling adopting mass percent concentration 8 ~ 12%, temperature controls at 50-70 DEG C, and the time is 0.5-2min.The effect of this step is the pH value neutralizing described aluminum alloy forge piece surface, stops the described aluminum alloy forge piece of corrosion further.
As preferred technical scheme, the technique of described light is as follows: adopt mass percent concentration to be described aluminum alloy forge piece after the salpeter solution of 20-30% steeps for the first alkali cleaning, soak time is 1-2min.The effect of this step is the alkalescence of neutralization the first alkali cleaning further.
As preferred technical scheme, the technique of described second alkali cleaning is as follows: the described aluminum alloy forge piece of NaOH solution cleaning after cutting fluid is soaked adopting mass percent concentration 6-8%, temperature controls at 20-40 DEG C, and the time is 4-5min.The effect of this step is degreasing and washes away greasy dirt.
As preferred technical scheme, the technique of described second pickling is as follows: the described aluminum alloy forge piece of salpeter solution cleaning after the second alkali cleaning adopting mass percent concentration 4 ~ 6%, temperature controls at 30-50 DEG C, time 4-5min.The effect of this step is the alkalescence of neutralization second alkali cleaning.
As preferred technical scheme, described drying is air-dry.
The present invention compared with prior art, there is following beneficial effect: need in technique of the present invention to soak in cutting fluid, the settling velocity of carbon granule can be accelerated like this, increase work efficiency, fine and close lubricant film can also be formed simultaneously on the surface of aluminum alloy forge piece and prevent surface oxidation.
(1) select the mixing acid of nitric acid and phosphoric acid in this technique in the first pickling, make the smooth finish on the aluminum alloy forge piece surface after washing better, and the ability of degreasing is also stronger.
(2) this process increases production efficiency, reduce production cost, and maturation simple to operate, be suitable for large-scale promotion application.
Embodiment
Be clearly and completely described to the technical scheme in the embodiment of the present invention below, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The present invention utilizes the amphoteric character of aluminum alloy forge piece, namely meets acid, chance alkali all can corrode, and the characteristic that graphite is acidproof, alkaline-resisting, erode skim metal at aluminum alloy forge piece, make the exposed method separated of carbon granule.Based on this, the invention provides a kind of method for cleaning surface of alloy forged piece.Wherein the selection of the kind of the acid of the first pickling and cutting fluid immersion process are key point of the present invention.Cutting fluid selects the aluminum alloy cutting fluid that market is sold, without other special requirement.Below will elaborate concrete using method.The material used in following examples is commercially available prod.
Embodiment 1
A method for cleaning surface for aluminum alloy forge piece, comprising:
Aluminum alloy forge piece surface being contained carbon granule carries out the cleaning of following steps;
Step S1: the first pickling;
The preparation of mixing acid: the phosphoric acid solution 0.5L getting mass percent concentration 40%, get the salpeter solution 0.5L of mass percent concentration 10%, (number of liquor capacity is relevant with the quantity of cleaning workpiece phosphoric acid solution and salpeter solution to be mixed to get mixing acid, the cleaning of individual pieces is only advisable can flood workpiece, if when cleaning in enormous quantities, then need the appropriate volume getting certain percentage strength solution, the liquor capacity of the present embodiment is for 1L);
Use the mixing acid cleaning aluminum alloy forging of above-mentioned preparation, the temperature in cleaning process controls at about 80 DEG C, cleans about 3 minutes, until the surface exposure carbon granule of aluminum alloy forge piece, then carries out next step cleaning.If use single acid to carry out cleaning or remove this mixing acid in this process to clean, the smooth finish on the aluminum alloy forge piece surface after general cleaning is not good.The pickling of this step has an even effect, the greasy dirt on a removal aluminum alloy forge piece surface, the carbon granule on two exposed aluminium alloy forged piece surfaces.
Step S2: the first alkali cleaning; The effect of this step is the pH value neutralizing described aluminum alloy forge piece surface, stops the described aluminum alloy forge piece of corrosion further.
The NaOH solution 1L of functional quality percentage concentration 8%, cleans the aluminum alloy forge piece after the first pickling, and temperature controls at about 50 DEG C, and the time is about 0.5min.
Step S3: light; The effect of this step is the alkalescence of neutralization the first alkali cleaning further.
Employing mass percent concentration is the salpeter solution 1L of 20%, and the aluminum alloy forge piece after the first alkali cleaning is put into this salpeter solution and soaks, soak time is about 2min.
Step S4: soak in cutting fluid;
Aluminum alloy forge piece after bright program is placed in aluminum alloy cutting fluid and soaks, general immersion 2-3 days, the carbon granule rapid subsidence on the aluminum alloy forge piece surface after soaking, prevents surface oxidation at the lubricant film of aluminum alloy forge piece surface production densification simultaneously; Therefore this step is antirust and clean committed step.And not containing this step in the cleaning of prior art, but directly carry out pure water immersion, the carbon granule settling velocity on such aluminum alloy forge piece surface is slow, length consuming time, is also difficult to form the lubricant film producing provide protection.Therefore, use process that cutting fluid is soaked compared with prior art, efficiency is high, antirust and cleaning effect is better.
Step S5: the second alkali cleaning; The effect of this step is degreasing and washes away greasy dirt.
Adopt the NaOH solution 1L of mass percent concentration 6%, clean the aluminum alloy forge piece after cutting fluid is soaked, in whole process, temperature controls at 20 DEG C, and the time is about 4min.
Step S6: the second pickling; The effect of this step is the alkalescence of neutralization second alkali cleaning.
Adopt the aluminum alloy forge piece of salpeter solution cleaning after the second alkali cleaning of mass percent concentration 4%, the temperature in cleaning process controls at about 30 DEG C, time about 4min.
Step S7: soak in water;
Be placed in pure water by aluminum alloy forge piece after step S6 process and soak 2-3 days, the object one of immersion is the aluminum alloy forge piece after clean acid-base neutralisation, and another is can the residual quantity of carbon granule in detection by quantitative tank, can shorten this time during batch production.
Step S8: the washmarking on air-dry aluminum alloy forge piece after step S7 soaks.
Aluminum alloy forge piece after S1-8 step process, its surface does not almost have particle residue, and oily waste degradation is effective, does not have washmarking, the true qualities light of aluminum alloy forge piece surface presentation aluminium alloy.
Embodiment 2
A method for cleaning surface for aluminum alloy forge piece, comprising:
Aluminum alloy forge piece surface being contained carbon granule carries out the cleaning of following steps;
Step S1: the first pickling;
The preparation of mixing acid: the phosphoric acid solution 0.5L getting mass percent concentration 60%, gets the salpeter solution 0.5L of mass percent concentration 10%, phosphoric acid solution and salpeter solution is mixed to get mixing acid;
Use the mixing acid cleaning aluminum alloy forging of above-mentioned preparation, the temperature in cleaning process controls at about 100 DEG C, cleans about 5 minutes, until the surface exposure carbon granule of aluminum alloy forge piece, then carries out next step cleaning.If use single acid to carry out cleaning or remove this mixing acid in this process to clean, the smooth finish on the aluminum alloy forge piece surface after general cleaning is not good.The pickling of this step has an even effect, the greasy dirt on a removal aluminum alloy forge piece surface, the carbon granule on two exposed aluminium alloy forged piece surfaces.
Step S2: the first alkali cleaning; The effect of this step is the pH value neutralizing described aluminum alloy forge piece surface, stops the described aluminum alloy forge piece of corrosion further.
The NaOH solution 1L of functional quality percentage concentration 10%, cleans the aluminum alloy forge piece after the first pickling, and temperature controls at about 60 DEG C, and the time is about 1.0min.
Step S3: light; The effect of this step is the alkalescence of neutralization the first alkali cleaning further.
Employing mass percent concentration is the salpeter solution 1L of 25%, and the aluminum alloy forge piece after the first alkali cleaning is put into this salpeter solution and soaks, soak time is about 1min.
Step S4: soak in cutting fluid;
Aluminum alloy forge piece after bright program is placed in aluminum alloy cutting fluid and soaks, general immersion 2-3 days, the carbon granule rapid subsidence on the aluminum alloy forge piece surface after soaking, prevents surface oxidation at the lubricant film of aluminum alloy forge piece surface production densification simultaneously; Therefore this step is antirust and clean committed step.And not containing this step in the cleaning of prior art, but directly carry out pure water immersion, the carbon granule settling velocity on such aluminum alloy forge piece surface is slow, length consuming time, is also difficult to form the lubricant film producing provide protection.Therefore, use process that cutting fluid is soaked compared with prior art, efficiency is high, antirust and cleaning effect is better.
Step S5: the second alkali cleaning; The effect of this step is degreasing and washes away greasy dirt.
Adopt the NaOH solution 1L of mass percent concentration 7%, clean the aluminum alloy forge piece after cutting fluid is soaked, in whole process, temperature controls at 30 DEG C, and the time is about 4min.
Step S6: the second pickling; The effect of this step is the alkalescence of neutralization second alkali cleaning.
Adopt the aluminum alloy forge piece of salpeter solution cleaning after the second alkali cleaning of mass percent concentration 5%, the temperature in cleaning process controls at about 40 DEG C, time about 5min.
Step S7: soak in water;
Be placed in pure water by aluminum alloy forge piece after step S6 process and soak 2-3 days, the object one of immersion is the aluminum alloy forge piece after clean acid-base neutralisation, and another is can the residual quantity of carbon granule in detection by quantitative tank, can shorten this time during batch production.
Step S8: the washmarking on air-dry aluminum alloy forge piece after step S7 soaks.
Embodiment 3
A method for cleaning surface for aluminum alloy forge piece, comprising:
Aluminum alloy forge piece surface being contained carbon granule carries out the cleaning of following steps;
Step S1: the first pickling;
The preparation of mixing acid: the phosphoric acid solution 0.5L getting mass percent concentration 50%, gets the salpeter solution 0.5L of mass percent concentration 5%, phosphoric acid solution and salpeter solution is mixed to get mixing acid;
Use the mixing acid cleaning aluminum alloy forging of above-mentioned preparation, the temperature in cleaning process controls at about 110 DEG C, cleans about 5 minutes, until the surface exposure carbon granule of aluminum alloy forge piece, then carries out next step cleaning.If use single acid to carry out cleaning or remove this mixing acid in this process to clean, the smooth finish on the aluminum alloy forge piece surface after general cleaning is not good.The pickling of this step has an even effect, the greasy dirt on a removal aluminum alloy forge piece surface, the carbon granule on two exposed aluminium alloy forged piece surfaces.
Step S2: the first alkali cleaning; The effect of this step is the pH value neutralizing described aluminum alloy forge piece surface, stops the described aluminum alloy forge piece of corrosion further.
The NaOH solution 1L of functional quality percentage concentration 12%, cleans the aluminum alloy forge piece after the first pickling, and temperature controls at about 70 DEG C, and the time is about 2.0min.
Step S3: light; The effect of this step is the alkalescence of neutralization the first alkali cleaning further.
Employing mass percent concentration is the salpeter solution 1L of 30%, and the aluminum alloy forge piece after the first alkali cleaning is put into this salpeter solution and soaks, soak time is about 1min.
Step S4: soak in cutting fluid;
Aluminum alloy forge piece after bright program is placed in aluminum alloy cutting fluid and soaks, general immersion 2-3 days, the carbon granule rapid subsidence on the aluminum alloy forge piece surface after soaking, prevents surface oxidation at the lubricant film of aluminum alloy forge piece surface production densification simultaneously; Therefore this step is antirust and clean committed step.And not containing this step in the cleaning of prior art, but directly carry out pure water immersion, the carbon granule settling velocity on such aluminum alloy forge piece surface is slow, length consuming time, is also difficult to form the lubricant film producing provide protection.Therefore, use process that cutting fluid is soaked compared with prior art, efficiency is high, antirust and cleaning effect is better.
Step S5: the second alkali cleaning; The effect of this step is degreasing and washes away greasy dirt.
Adopt the NaOH solution 1L of mass percent concentration 8%, clean the aluminum alloy forge piece after cutting fluid is soaked, in whole process, temperature controls at 40 DEG C, and the time is about 4min.
Step S6: the second pickling; The effect of this step is the alkalescence of neutralization second alkali cleaning.
Adopt the aluminum alloy forge piece of salpeter solution cleaning after the second alkali cleaning of mass percent concentration 6%, the temperature in cleaning process controls at about 50 DEG C, time about 4min.
Step S7: soak in water;
Be placed in pure water by aluminum alloy forge piece after step S6 process and soak 2-3 days, the object one of immersion is the aluminum alloy forge piece after clean acid-base neutralisation, and another is can the residual quantity of carbon granule in detection by quantitative tank, can shorten this time during batch production.
Step S8: the washmarking on air-dry aluminum alloy forge piece after step S7 soaks.
Aluminum alloy forge piece after S1-8 step process, its surface does not almost have particle residue, and oily waste degradation is effective, does not have washmarking, the true qualities light of aluminum alloy forge piece surface presentation aluminium alloy.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a method for cleaning surface for aluminum alloy forge piece, is characterized in that comprising:
Aluminum alloy forge piece surface being contained carbon granule carries out the cleaning of following steps;
First pickling;
First alkali cleaning;
Light;
Soak in cutting fluid;
Second alkali cleaning;
Second pickling;
Soak in water; And
Dry.
2. the method for cleaning surface of a kind of aluminum alloy forge piece according to claim 1, is characterized in that, described cutting fluid is aluminum alloy cutting fluid.
3. the method for cleaning surface of a kind of aluminum alloy forge piece according to claim 1, it is characterized in that, the technique of described first pickling is as follows: adopt the mixing acid of the phosphoric acid solution of mass percent concentration 40-60% and the salpeter solution of mass percent concentration 5-10% to clean described aluminum alloy forge piece, temperature controls at 80-110 DEG C, cleans to the surface exposure carbon granule of described aluminum alloy forge piece.
4. the method for cleaning surface of a kind of aluminum alloy forge piece according to claim 3, is characterized in that, described scavenging period is 3-5min.
5. the method for cleaning surface of a kind of aluminum alloy forge piece according to claim 3 or 4, is characterized in that, the volume ratio of described phosphoric acid solution and described salpeter solution is 1-1.
6. the method for cleaning surface of a kind of aluminum alloy forge piece according to claim 1, it is characterized in that, the technique of described first alkali cleaning is as follows: the described aluminum alloy forge piece of NaOH solution cleaning after the first pickling adopting mass percent concentration 8 ~ 12%, temperature controls at 50-70 DEG C, and the time is 0.5-2min.
7. the method for cleaning surface of a kind of aluminum alloy forge piece according to claim 1, it is characterized in that, the technique of described light is as follows: adopt mass percent concentration to be described aluminum alloy forge piece after the salpeter solution of 20-30% steeps for the first alkali cleaning, soak time is 1-2min.
8. the method for cleaning surface of a kind of aluminum alloy forge piece according to claim 1, it is characterized in that, the technique of described second alkali cleaning is as follows: the described aluminum alloy forge piece of NaOH solution cleaning after light adopting mass percent concentration 6-8%, temperature controls at 20-40 DEG C, and the time is 4-5min.
9. the method for cleaning surface of a kind of aluminum alloy forge piece according to claim 1, it is characterized in that, the technique of described second pickling is as follows: the described aluminum alloy forge piece of salpeter solution cleaning after the second alkali cleaning adopting mass percent concentration 4 ~ 6%, temperature controls at 30-50 DEG C, time 4-5min.
10. the method for cleaning surface of a kind of aluminum alloy forge piece according to claim 1, is characterized in that, described drying is air-dry.
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| CN106521528A (en) * | 2016-11-25 | 2017-03-22 | 遵义恒佳铝业有限公司 | Surface treatment process for aluminum rods |
| CN111448343A (en) * | 2017-12-12 | 2020-07-24 | 海德鲁铝业钢材有限公司 | Corrosion method for profiles, rolled strips and plates made of aluminium alloy |
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| CN100497734C (en) * | 2007-09-21 | 2009-06-10 | 北京化工大学 | Chemical treatment method for aluminum alloy surface |
| CN104073856A (en) * | 2014-06-26 | 2014-10-01 | 深圳惠科精密工业有限公司 | Method for oxidating metal part |
| CN104195582A (en) * | 2014-09-09 | 2014-12-10 | 青岛润鑫伟业科贸有限公司 | Cleaning method of industrial pure aluminum |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106521528A (en) * | 2016-11-25 | 2017-03-22 | 遵义恒佳铝业有限公司 | Surface treatment process for aluminum rods |
| CN111448343A (en) * | 2017-12-12 | 2020-07-24 | 海德鲁铝业钢材有限公司 | Corrosion method for profiles, rolled strips and plates made of aluminium alloy |
| JP2021505773A (en) * | 2017-12-12 | 2021-02-18 | ハイドロ アルミニウム ロールド プロダクツ ゲゼルシャフト ミット ベシュレンクテル ハフツングＨｙｄｒｏ Ａｌｕｍｉｎｉｕｍ Ｒｏｌｌｅｄ Ｐｒｏｄｕｃｔｓ ＧｍｂＨ | Pickling methods for profiles made of aluminum alloy, rolled strips and sheet steel |
| JP7216097B2 (en) | 2017-12-12 | 2023-01-31 | スペイラ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Pickling method for profiles, rolled strips and sheets made of aluminum alloys |
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