CN105463429A - 一种铝材的钝化方法 - Google Patents
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- 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
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- 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
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- C23C22/40—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 molybdates, tungstates or vanadates
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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
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Abstract
本发明公开了一种铝材的钝化方法,包括步骤:脱脂、除油、碱净化、出光、活化、铈钼氧化膜。本发明能够提高铝材的耐腐蚀能力,通过对铝材做钝化处理,使铝材表面形成钝化膜,有效阻隔空气与铝材接触,有效避免铝材的氧化、腐化;又由于本发明通过采用铈钼氧化膜代理原来的铬酸盐钝化,有效减少对环境的污染以及对人体的伤害,有益效果明显,适于推广使用。
Description
技术领域
本发明涉及一种铝材的处理方法,尤其是一种铝材的钝化方法。。
背景技术
铝是活泼金属,在空气中极易氧化,这是它的固有特性,也是刷镀过程中必须重视的问题。无论是化学氧化法或阳极氧化法制取的氧化膜都是多孔的,易受污染,耐蚀性不高。例如,铝及铝合金阳极氧化膜是一种具有蜂窝状结构的多孔膜,其微孔数量达4~77×10个/cm2,比表面积非常高。因此,使得氧化膜的表面具有极高的化学活性,空气中或者使用环境中的腐蚀介质或污染物极易被吸附到膜孔内,所以未经封闭处理的铝合金阳极氧化膜耐蚀性和抗污染能力均不高。即使氧化膜在染色后也应进行钝化或封闭处理,以提高其耐蚀性。
发明内容
发明目的:针对上述问题,本发明的目的提供能够有效提高铝材耐腐蚀性能的钝化方法。
技术方案:为了解决以上问题,本发明提供一种铝材的钝化方法,包括步骤
(1)脱脂:将经过打磨的铝材浸入脱脂液中脱脂,处理之间为5-10min;
(2)除油:将脱脂后的铝材浸入除油液中,所述除油液为8-10g/LNaOH、20-30g/LNa3PO4、6-9g/LNa2CO3;
(3)碱净化:将除油后的铝材浸入碱腐蚀液中,所述碱腐蚀液为8-12g/LNaOH;
(4)出光:将经过碱净化的铝材做出光处理,出光液100-110mL/LH2SO4,ρ=1.7g/mL、50-55mL/LH2O2,w=37%;
(5)活化:将出光后的铝材放入活化液中,活化液为THY-2B活化液;
(6)铈钼氧化膜:将经过活化的铝材放入溶液中,所述溶液包括:2-4g/LNaKC4H4O6·4H2O、8-12g/LNa2CO3、1-2g/L(NH4)2Ce(NO3)6和2-9g/LNa2MoO4,处理温度为95-100℃,处理时间为20-30min。
所述铈钼氧化膜厚度为2-3mm。
所述的碱腐蚀溶液包括15mmol/LC4H4O6Kna、0.4mol/LNH2C6H4OH、0.8mmol/LK2MnO4。
所述的THY-2B活化液包括:12-14g/LHCl、120-130g/LNaCl、5-8g/LHf,pH值0.2-0.5,采用蒸馏水配置。
有益效果:与现有技术相比,本发明具有以下优点:
1.提高铝材的耐腐蚀能力:本发明通过对铝材做钝化处理,使铝材表面形成钝化膜,有效阻隔空气与铝材接触,有效避免铝材的氧化、腐化;
2.环保:本发明通过采用铈钼氧化膜代理原来的铬酸盐钝化,有效减少对环境的污染以及对人体的伤害,有益效果明显。
具体实施方式
实施例1
一种铝材的钝化方法,包括步骤
(1)脱脂:将经过打磨的铝材浸入脱脂液中脱脂,处理之间为5min;
(2)除油:将脱脂后的铝材浸入除油液中,所述除油液为8g/LNaOH、20g/LNa3PO4、6g/LNa2CO3;
(3)碱净化:将除油后的铝材浸入碱腐蚀液中,所述碱腐蚀液为8g/LNaOH;
(4)出光:将经过碱净化的铝材做出光处理,出光液100mL/LH2SO4,ρ=1.7g/mL、50mL/LH2O2,w=37%;
(5)活化:将出光后的铝材放入活化液中,活化液为THY-2B活化液,所述的THY-2B活化液包括:12g/LHCl、120g/LNaCl、5g/LHf,pH值0.2,采用蒸馏水配置;
(6)铈钼氧化膜:铈钼氧化膜厚度为2mm;将经过活化的铝材放入溶液中,所述溶液包括:2g/LNaKC4H4O6·4H2O、8g/LNa2CO3、1g/L(NH4)2Ce(NO3)6和2g/LNa2MoO4,处理温度为95℃,处理时间为20min。
实施例2
一种铝材的钝化方法,包括步骤
(1)脱脂:将经过打磨的铝材浸入脱脂液中脱脂,处理之间为7min;
(2)除油:将脱脂后的铝材浸入除油液中,所述除油液为9g/LNaOH、25g/LNa3PO4、7g/LNa2CO3;
(3)碱净化:将除油后的铝材浸入碱腐蚀液中,所述的碱腐蚀溶液包括15mmol/LC4H4O6Kna、0.4mol/LNH2C6H4OH、0.8mmol/LK2MnO4;
(4)出光:将经过碱净化的铝材做出光处理,出光液105mL/LH2SO4,ρ=1.7g/mL、53mL/LH2O2,w=37%;
(5)活化:将出光后的铝材放入活化液中,活化液为THY-2B活化液,THY-2B活化液包括:13g/LHCl、126g/LNaCl、7g/LHf,pH值0.4,采用蒸馏水配置;
(6)铈钼氧化膜:所述铈钼氧化膜厚度为2.3mm;将经过活化的铝材放入溶液中,所述溶液包括:3g/LNaKC4H4O6·4H2O、10g/LNa2CO3、1.5g/L(NH4)2Ce(NO3)6和6g/LNa2MoO4,处理温度为97℃,处理时间为26min。
实施例3
一种铝材的钝化方法,包括步骤
(1)脱脂:将经过打磨的铝材浸入脱脂液中脱脂,处理之间为10min;
(2)除油:将脱脂后的铝材浸入除油液中,所述除油液为10g/LNaOH、30g/LNa3PO4、9g/LNa2CO3;
(3)碱净化:将除油后的铝材浸入碱腐蚀液中,所述的碱腐蚀溶液包括15mmol/LC4H4O6Kna、0.4mol/LNH2C6H4OH、0.8mmol/LK2MnO4;
(4)出光:将经过碱净化的铝材做出光处理,出光液110mL/LH2SO4,ρ=1.7g/mL、55mL/LH2O2,w=37%;
(5)活化:将出光后的铝材放入活化液中,活化液为THY-2B活化液,THY-2B活化液包括:14g/LHCl、130g/LNaCl、8g/LHf,pH值0.5,采用蒸馏水配置;
(6)铈钼氧化膜:所述铈钼氧化膜厚度为3mm,将经过活化的铝材放入溶液中,所述溶液包括:4g/LNaKC4H4O6·4H2O、12g/LNa2CO3、2g/L(NH4)2Ce(NO3)6和9g/LNa2MoO4,处理温度为100℃,处理时间为30min。
本发明的实施例是为了示例和描述起见而给出的,而并不是无遗漏的或者将本发明限于所公开的形式。很多修改和变化对于本领域的普通技术人员而言是显而易见的。选择和描述实施例是为了更好说明本发明的原理和实际应用,并且使本领域的普通技术人员能够理解本发明从而设计适于特定用途的带有各种修改的各种实施例。
Claims (4)
1.一种铝材的钝化方法,其特征在于:包括步骤
脱脂:将经过打磨的铝材浸入脱脂液中脱脂,处理之间为5-10min;
除油:将脱脂后的铝材浸入除油液中,所述除油液为8-10g/LNaOH、20-30g/LNa3PO4、6-9g/LNa2CO3;
碱净化:将除油后的铝材浸入碱腐蚀液中,所述碱腐蚀液为8-12g/LNaOH;
出光:将经过碱净化的铝材做出光处理,出光液100-110mL/LH2SO4,ρ=1.7g/mL、50-55mL/LH2O2,w=37%;
活化:将出光后的铝材放入活化液中,活化液为THY-2B活化液;
铈钼氧化膜:将经过活化的铝材放入溶液中,所述溶液包括:2-4g/LNaKC4H4O6·4H2O、8-12g/LNa2CO3、1-2g/L(NH4)2Ce(NO3)6和2-9g/LNa2MoO4,处理温度为95-100℃,处理时间为20-30min。
2.根据权利要求1所述的一种铝材的钝化方法,其特征在于:所述铈钼氧化膜厚度为2-3mm。
3.根据权利要求1所述的一种铝材的钝化方法,其特征在于:所述的碱腐蚀溶液包括15mmol/LC4H4O6Kna、0.4mol/LNH2C6H4OH、0.8mmol/LK2MnO4。
4.根据权利要求1所述的一种铝材的钝化方法,其特征在于:所述的THY-2B活化液包括:12-14g/LHCl、120-130g/LNaCl、5-8g/LHf,pH值0.2-0.5,采用蒸馏追配置。
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CN110257838A (zh) * | 2019-07-02 | 2019-09-20 | 佛山市南海区尚铭金属制品有限公司 | 铝型材喷粉前处理工艺 |
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