CN106400043A - 一种铝合金制品的表面处理工艺 - Google Patents
一种铝合金制品的表面处理工艺 Download PDFInfo
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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
- C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
- C23G5/02—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
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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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/32—Alkaline compositions
- C23F1/36—Alkaline compositions for etching aluminium or alloys thereof
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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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- 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
- C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
- C23G5/02—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents
- C23G5/028—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents containing halogenated hydrocarbons
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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
- C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
- C23G5/06—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using emulsions
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Abstract
本发明公开了一种铝合金制品的表面处理工艺,包括以下步骤:a)高压水洗:使用高压水喷射到铝合金制品表面,将表面附着的污垢去除;b)除油:若铝合金制品表面油污严重,选用有机溶剂除油,然后再用碱性盐溶液化学除油;若表面油污较少,直接选用含苛性碱的除油液,或用碱性盐溶液处理;c)化学浸蚀:将铝合金制品放置在浓度为10%~20%的苛性钠中进行浸蚀,浸蚀时间为2min;d)水洗:用清水将经过化学浸蚀过的铝合金制品进行清洗,本发明工艺简单,易于操作,能快速的将铝合金制品表面的锈蚀物去除,以便进行下一步工艺。
Description
技术领域
本发明涉及金属制品,更具体地说,本发明涉及一种铝合金制品的表面处理工艺。
背景技术
铝合金是工业中应用最广泛的一类有色金属结构材料,在航空、航天、汽车、机械制造、船舶及化学工业中已大量应用。铝会在表面氧化得到氧化铝,在进行各种表面处理时,必须预先除去这些氧化物。其方法有手工除锈、机械除锈和喷砂除锈等,而最通用的方法是采用各种碱类试剂处理来除锈。在清除时,不同工艺对清除效果有不同的影响。
发明内容
本发明目的是提供一种铝合金制品的表面处理工艺,高效的去除铝合金制品表面的锈蚀物。
为了解决上述技术问题,本发明采用的技术方案是:
一种铝合金制品的表面处理工艺,包括以下步骤:
a)高压水洗:使用高压水喷射到铝合金制品表面,将表面附着的污垢去除;
b)除油:若铝合金制品表面油污严重,选用有机溶剂除油,然后再用碱性盐溶液化学除油;若表面油污较少,直接选用含苛性碱的除油液,或用碱性盐溶液处理;
c)化学浸蚀:将铝合金制品放置在浓度为10%~20%的苛性钠中进行浸蚀,浸蚀时间为2min;
d)水洗:用清水将经过化学浸蚀过的铝合金制品进行清洗。
优选的,步骤b中有机溶剂为三氯乙烯或三氯乙烯与四氯乙烯的混合物。
进一步的,步骤b中,若铝合金制品表面油污严重,采用乳化除油替代有机溶剂除油,乳化除油包括以下步骤:把乳化剂与弱碱性肥皂或三乙醇胺与油酸形成的皂类进行混合,然后除油。
优选的,乳化剂为煤油或二甲苯。
优选的,乳化剂与皂类的浓度比为2:1。
步骤c中苛性钠溶液的温度为50~80℃。
本发明的有益效果是:
本发明工艺步骤简单,通过高压水洗、除油、化学浸蚀、水洗实现铝合金制品的表面除锈,以便进行下一步工序。
具体实施方式
以下对本发明的实施例进行详细说明,但是本发明可以由权利要求限定和覆盖的多种不同方式实施。
实施例一
本发明公开一种铝合金制品的表面处理工艺,包括以下步骤:
a)高压水洗:使用高压水喷射到铝合金制品表面,将表面附着的污垢去除;
b)除油:铝是两性金属,既能溶于酸,也能溶于碱。它在强碱性溶液中,会遭到剧烈浸蚀而生成铝酸盐;因此对这类金属制品的除油,不采用强碱性溶液。通常根据其表面黏附油污的程度,可采用不同的除油工艺,若铝合金制品表面油污严重,选用有机溶剂除油,有机溶剂为三氯乙烯或三氯乙烯与四氯乙烯的混合物,然后再用碱性盐溶液化学除油;若表面油污较少,直接选用含苛性碱的除油液,或用碱性盐溶液处理;
c)化学浸蚀:将铝合金制品放置在浓度为10%~20%、温度为50~80℃的苛性钠中进行浸蚀,浸蚀时间为2min;氢的强烈析出而促使非溶性污物离开金属表面,苛性钠为氢氧化钠。
d)水洗:用清水将经过化学浸蚀过的铝合金制品进行清洗。
实施例二
本发明公开一种铝合金制品的表面处理工艺,包括以下步骤:
a)高压水洗:使用高压水喷射到铝合金制品表面,将表面附着的污垢去除;
b)除油:铝是两性金属,既能溶于酸,也能溶于碱。它在强碱性溶液中,会遭到剧烈浸蚀而生成铝酸盐;因此对这类金属制品的除油,不采用强碱性溶液。通常根据其表面黏附油污的程度,可采用不同的除油工艺,若铝合金制品表面油污严重,采用乳化除油法除油,乳化除油包括以下步骤:把煤油或二甲苯等乳化剂与弱碱性肥皂或三乙醇胺与油酸形成的皂类进行混合,然后除油,油污在有机溶剂溶解和乳化的双重作用下被清洗,乳化剂与皂类的浓度比为2:1;若表面油污较少,直接选用含苛性碱的除油液,或用碱性盐溶液处理;
c)化学浸蚀:将铝合金制品放置在浓度为10%~20%、温度为50~80℃的苛性钠中进行浸蚀,浸蚀时间为2min;氢的强烈析出而促使非溶性污物离开金属表面,苛性钠为氢氧化钠。
d)水洗:用清水将经过化学浸蚀过的铝合金制品进行清洗。
以上所述的本发明实施方式,并不构成对本发明保护范围的限定,任何在本发明的精神和原则之内所作的修改、等同替换和改进等,均应包含在本发明的权利要求保护范围之内。
Claims (6)
1.一种铝合金制品的表面处理工艺,其特征在于,包括以下步骤:
a)高压水洗:使用高压水喷射到铝合金制品表面,将表面附着的污垢去除;
b)除油:若铝合金制品表面油污严重,选用有机溶剂除油,然后再用碱性盐溶液化学除油;若表面油污较少,直接选用含苛性碱的除油液,或用碱性盐溶液处理;
c)化学浸蚀:将铝合金制品放置在浓度为10%~20%的苛性钠中进行浸蚀,浸蚀时间为2min;
d)水洗:用清水将经过化学浸蚀过的铝合金制品进行清洗。
2.根据权利要求1所述一种铝合金制品的表面处理工艺,其特征在于,步骤b中有机溶剂为三氯乙烯或三氯乙烯与四氯乙烯的混合物。
3.根据权利要求1所述一种铝合金制品的表面处理工艺,其特征在于,步骤b中,若铝合金制品表面油污严重,采用乳化除油替代有机溶剂除油,乳化除油包括以下步骤:把乳化剂与弱碱性肥皂或三乙醇胺与油酸形成的皂类进行混合,然后除油。
4.根据权利要求3所述一种铝合金制品的表面处理工艺,其特征在于,乳化剂为煤油或二甲苯。
5.根据权利要求3所述一种铝合金制品的表面处理工艺,其特征在于,乳化剂与皂类的浓度比为2:1。
6.根据权利要求1所述一种铝合金制品的表面处理工艺,其特征在于,步骤c中苛性钠溶液的温度为50~80℃。
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Cited By (1)
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CN108486594A (zh) * | 2018-05-11 | 2018-09-04 | 合肥博创机械制造有限公司 | 一种工程机械中轴承的高效清洗方法 |
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Non-Patent Citations (2)
Title |
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张东初: "《设计材料与加工工艺》", 30 September 2003, 郑州:河南人民出版社 * |
陈启复: "《中国气动工业发展史》", 31 October 2012, 北京:机械工业出版社 * |
Cited By (1)
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CN108486594A (zh) * | 2018-05-11 | 2018-09-04 | 合肥博创机械制造有限公司 | 一种工程机械中轴承的高效清洗方法 |
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