CN1074950A - 镀锌件表面化学着黑剂 - Google Patents
镀锌件表面化学着黑剂 Download PDFInfo
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- CN1074950A CN1074950A CN 92100656 CN92100656A CN1074950A CN 1074950 A CN1074950 A CN 1074950A CN 92100656 CN92100656 CN 92100656 CN 92100656 A CN92100656 A CN 92100656A CN 1074950 A CN1074950 A CN 1074950A
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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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/24—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds
- C23C22/26—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds containing also organic compounds
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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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/24—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds
- C23C22/33—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds containing also phosphates
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Abstract
本发明为一种用于镀锌制件表面化学着黑工艺
的着黑剂。该着黑剂采用Cu-Ag-Cr体系,并辅有
表面活性剂,有机酸或无机酸作为必要的添加成分。
该着黑剂着黑性能稳定,易于操作,抗干扰能力强,工
艺条件易掌握等特点、着黑膜黑度高,牢度好,膜厚、
均匀有光泽,抗蚀性优良。该体系用银量少,成本低,
配制方法易掌握,着黑剂可以再生使用。
Description
本发明涉及金属、非金属制品表面着色防蚀剂,是一种适用于锌制件或金属,非金属表面镀锌制件的化学着黑剂。
常用金属尤其是钢铁,由于大气中氧、水、二氧化碳等化学物质的侵蚀,会有不同程度的腐蚀现象,因此,提高金属防蚀能力,减少损耗,延长使用寿命,对增产节约有重要意义。目前国际上流行黑色精饰,汽车、自行车零件、电讯器材、家用电器、灯具及家具的外表面,经化学着黑处理形成色膜,既能防腐又能改进产品外观,明显地提高了产品的社会竞争能力。
目前化学着黑防蚀方法中“镀锌表面化学着黑”技术是比较理想的方法。对该项技术中所使用的着黑剂,不少国家均有研究。美、英、苏等国采用硫酸铜作为发黑体系(简称铜盐体系),这种体系只能得到黑灰色的钝化膜;日本Udylite和Dipsol公司开发的黑色钝化液均采用磷酸银作为发黑剂(简称银盐体系)。我国武汉材料保护研究所研制的与日本类型相同的ZB-82型镀锌层黑色钝化剂银用量高,原料依赖进口,此外,着黑钝化工艺繁琐,操作条件苛刻。如:不能将硝酸带入钝化液,出光零件必须严格水洗,迅速干燥,水洗和空停时间对钝化膜的质量会产生明显影响。着黑处理温度必须在20-30℃,否则明显影响着黑效果。台湾莱德化工有限公司的BD-200染黑剂对着黑时间要求苛刻,限在20秒以内,否则对着黑效果有严重影响,且抗蚀性能差。
为了稳定着黑工艺,提高着黑工艺中抗干扰能力,降低着黑剂成本,并使黑色钝化膜的性能达到或优于国内外同类产品,本发明提出一种独特的镀锌表面着黑剂。
本着黑剂采用铜-银-铬体系,它的组成为:每升着黑剂中含有(1)铜盐、银盐和铬化合物,其中Cu2+含量1-40克,Ag+含量0.001-8克,Cr(Ⅵ)含量2-80克;(2)表面活性剂1-60克,该表面活性剂必须是非离子表面活性剂,或两性离子表面活性剂,或阴离子表面活性剂,或上述各种表面活性剂的混合物;(3)醋酸和醋酸盐混合物5-120克,磷酸和磷酸盐混合物亦可代替醋酸和醋酸盐,用量为3-80克;(4)硫酸镁或硫酸钠5-25克。
将上述(1)、(2)、(3)、(4)类组分分别用水溶解、稀释,然后将铜盐、银盐、表面活性剂以及酸和盐混合物溶液混和、最后加入铬化合物溶液,并用水定容至1升,搅拌均匀。
本发明方案中所述的铜盐可采用硫酸铜、醋酸铜、氢氧化铜或氧化铜;所用银盐可用硝酸银、铬酸银、重铬酸银或硫酸银;所用铬化合物可采用铬酸、重铬酸、铬酸盐、重铬酸盐或三氧化铬。
本着黑剂适用于锌制件或镀锌制件的表面着黑工艺。镀锌制件可以是金属镀锌制件,亦可以是非金属镀锌制件。
本发明的铜-银-铬体系着黑剂在着黑工艺过程中抗干扰能力强,适用温度范围大,在40--5℃条件下着黑效果不受影响,着黑件浸泡时间为10分钟左右,NO- 3、水洗和空气中放置时间不影响黑膜质量,也易于掌握黑膜厚度。由于本发明的着黑剂用银量少,原料来源立足国内,因此成本较低。
本着黑剂应于密闭阴凉处保存,经多次使用着黑性能减退后,加入适量铬化合物、银盐、铜盐可恢复原着黑性能,经多次再生使用方作废弃。
为了详细说明本着黑剂的配方组分,特举以下实施例。
实施例一,原料采用硫酸铜、硝酸银、重铬酸钠,每升溶液中离子含量为:Cu2+5-10克,Ag+0.001-2克,Cr(Ⅵ)2-10克;采用OP乳化剂1-10克/升;醋酸和醋酸盐混合物5-20克/升;硫酸镁5-10克/升。上述各组分用蒸馏水溶解稀释备用,先将硫酸铜、硝酸银、OP乳化剂、醋酸和醋酸盐混合物、硫酸镁5种溶液混合稀释,搅拌均匀。再将重铬酸钠溶液并入,再用蒸馏水定容至1升,搅拌均匀。即可用于镀锌件的浸泡着黑。
实施例二,原料采用醋酸铜、铬酸银、三氧化铬、阴离子表面活性剂,醋酸和醋酸盐混合物、硫酸钠。每升着黑剂中上述物质含量为:Cu2+10-20克,Ag+5-8克,Cr(Ⅵ)70克,阴离子表面活性剂30-40克,醋酸和醋酸盐混合物80克,硫酸钠15克。
实施例三,每升着黑剂中各组分含量为:氢氧化铜(含Cu2+40克),硫酸银(含Ag+8克)、重铬酸(含Cr(Ⅵ)80克),非离子表面活性剂60克,磷酸和磷酸盐混合物60克,硫酸镁或硫酸钠11-25克,用水溶解稀释各组分并定容至1升。
实施例四,每升着黑剂中各组分含量为:氧化铜(含Cu2+1-40克),硫酸银(含Ag+0.001-8克),重铬酸盐(含Cr(Ⅵ)2-80克),两性离子表面活性剂1-60克,磷酸和磷酸盐混合物总量30-45克,硫酸镁5-25克,用水溶解并稀释各组分,用水定溶至1升。以上二、三、四例配制方法与实施例一相同。
实施例五,原料采用硫酸铜、硝酸银、三氧化铬、阴离子表面活性剂和非离子表面活性剂混合物、醋酸和醋酸盐混合物,硫酸镁。上述各组分含量分别为:硫酸铜含Cu2+5-30克/升,硝酸银含Ag+0.001-2克/升,三氧化铬含Cr(Ⅵ)5-40克/升,阴离子和非离子表面活性剂5-45克/升,醋酸和醋酸盐混合物:5-100克/升,硫酸镁1-15克/升。配制方法与实施例一相同。
Claims (3)
1、一种用于镀锌制件表面化学着黑的着黑剂,其特征在于,该着黑剂以铜盐、银盐、铬化合物为主要成分,每升着黑剂中含Cu2+1-40克,Ag+0.001-8克,Cr(VI)2-80克。
2、根据权利要求1所述镀锌制件表面着黑剂,其特征在于,每升着黑剂中含有(1)表面活性剂1-60克,该表面活性剂必须是非离子表面活性剂,或两性离子表面活性剂,或阴离子表面活性剂,或上述各种表面活性剂的混合物;(2)醋酸和醋酸盐混合物5-120克,或磷酸和磷酸盐混合物3-80克;(3)硫酸镁或硫酸钠5-25克。
1、根据权利要求1或2所述镀锌制件表面着色剂,其特征在于它的配制方法是:先将各组分用水溶解、然后将铜盐、银盐、表面活性剂、醋酸和醋酸盐混合物或磷酸和磷酸盐混合物,硫酸镁或硫酸钠溶液混合,稀释,最后加入铬化合物溶液,并用水定容至1升,搅拌均匀。
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111101122A (zh) * | 2020-02-19 | 2020-05-05 | 广州三孚新材料科技股份有限公司 | 一种电镀锌黑色钝化液及其制备方法 |
CN115386868A (zh) * | 2022-09-22 | 2022-11-25 | 贵州航天精工制造有限公司 | 一种镀锌黑色钝化溶液及其制备方法 |
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1992
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111101122A (zh) * | 2020-02-19 | 2020-05-05 | 广州三孚新材料科技股份有限公司 | 一种电镀锌黑色钝化液及其制备方法 |
CN115386868A (zh) * | 2022-09-22 | 2022-11-25 | 贵州航天精工制造有限公司 | 一种镀锌黑色钝化溶液及其制备方法 |
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