CN116288306A - 一种铁塔构件用无铬哑光钝化液 - Google Patents
一种铁塔构件用无铬哑光钝化液 Download PDFInfo
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 238000002161 passivation Methods 0.000 title claims abstract description 48
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 36
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 45
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 25
- -1 acrylic ester Chemical class 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 12
- 229920002635 polyurethane Polymers 0.000 claims abstract description 12
- 239000004814 polyurethane Substances 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 9
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims abstract description 7
- IMQLKJBTEOYOSI-GPIVLXJGSA-N Inositol-hexakisphosphate Chemical compound OP(O)(=O)O[C@H]1[C@H](OP(O)(O)=O)[C@@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@@H]1OP(O)(O)=O IMQLKJBTEOYOSI-GPIVLXJGSA-N 0.000 claims abstract description 7
- IMQLKJBTEOYOSI-UHFFFAOYSA-N Phytic acid Natural products OP(O)(=O)OC1C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C1OP(O)(O)=O IMQLKJBTEOYOSI-UHFFFAOYSA-N 0.000 claims abstract description 7
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229940068041 phytic acid Drugs 0.000 claims abstract description 7
- 235000002949 phytic acid Nutrition 0.000 claims abstract description 7
- 239000000467 phytic acid Substances 0.000 claims abstract description 7
- 229960001367 tartaric acid Drugs 0.000 claims abstract description 7
- 235000002906 tartaric acid Nutrition 0.000 claims abstract description 7
- 239000011975 tartaric acid Substances 0.000 claims abstract description 7
- TUSDEZXZIZRFGC-UHFFFAOYSA-N 1-O-galloyl-3,6-(R)-HHDP-beta-D-glucose Natural products OC1C(O2)COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC1C(O)C2OC(=O)C1=CC(O)=C(O)C(O)=C1 TUSDEZXZIZRFGC-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000001263 FEMA 3042 Substances 0.000 claims abstract description 6
- LRBQNJMCXXYXIU-PPKXGCFTSA-N Penta-digallate-beta-D-glucose Natural products OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-PPKXGCFTSA-N 0.000 claims abstract description 6
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 6
- LRBQNJMCXXYXIU-QWKBTXIPSA-N gallotannic acid Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@H]2[C@@H]([C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-QWKBTXIPSA-N 0.000 claims abstract description 6
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 6
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229940033123 tannic acid Drugs 0.000 claims abstract description 6
- 235000015523 tannic acid Nutrition 0.000 claims abstract description 6
- 229920002258 tannic acid Polymers 0.000 claims abstract description 6
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052912 lithium silicate Inorganic materials 0.000 claims abstract description 4
- XTIIITNXEHRMQL-UHFFFAOYSA-N tripotassium methoxy(trioxido)silane Chemical compound [K+].[K+].[K+].CO[Si]([O-])([O-])[O-] XTIIITNXEHRMQL-UHFFFAOYSA-N 0.000 claims abstract description 4
- XYRAEZLPSATLHH-UHFFFAOYSA-N trisodium methoxy(trioxido)silane Chemical compound [Na+].[Na+].[Na+].CO[Si]([O-])([O-])[O-] XYRAEZLPSATLHH-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000005406 washing Methods 0.000 claims description 16
- 238000007747 plating Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 11
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 10
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 10
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 10
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 239000002736 nonionic surfactant Substances 0.000 claims description 10
- 229920001296 polysiloxane Polymers 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 8
- 239000004925 Acrylic resin Substances 0.000 claims description 6
- 229920000178 Acrylic resin Polymers 0.000 claims description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 6
- 238000004381 surface treatment Methods 0.000 claims description 5
- 239000002918 waste heat Substances 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 4
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 2
- 238000007602 hot air drying Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 5
- 238000000576 coating method Methods 0.000 abstract description 2
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 239000003973 paint Substances 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 239000010842 industrial wastewater Substances 0.000 abstract 1
- 239000000654 additive Substances 0.000 description 6
- 230000000996 additive effect Effects 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004111 Potassium silicate Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 125000005396 acrylic acid ester group Chemical group 0.000 description 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- BHGADZKHWXCHKX-UHFFFAOYSA-N methane;potassium Chemical compound C.[K] BHGADZKHWXCHKX-UHFFFAOYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052913 potassium silicate Inorganic materials 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- 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
- C23C22/48—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 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
- C23C22/50—Treatment of iron or alloys based thereon
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/26—After-treatment
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
本发明公开了一种铁塔构件用无铬哑光钝化液,所述铁塔构件用无铬哑光钝化液中各组分浓度如下:无机成膜剂0.5~300g/L,有机成膜剂0.1~50g/L,钝化剂5~100g/L,哑光剂0.20~0.25 g/L,其中所述无机成膜剂为硅酸钠、硅酸锂、甲基硅酸钠、甲基硅酸钾中的一种或多种任意比例的混合物;所述有机成膜剂为丙烯酸酯或者水性聚氨酯中的任意一种;所述钝化剂为植酸、鞣酸和酒石酸中一种或多种任意比例的混合物;所述哑光剂为金红石型钛白粉。通过上述方式,本发明能够降低钝化工艺中产生的工业废水中的重金属含量,降低环境污染的压力,而且钝化膜还具有哑光功能,免去后序涂附哑光漆,降低了总体成本。
Description
技术领域
本发明涉及金属表面处理领域,特别是涉及一种铁塔构件用无铬哑光钝化液。
背景技术
电力铁塔是电力系统的基础设施,由于电力铁塔一般都是建设在野外空旷位置,因此铁塔构件在铸造成型之后需要进行表面处理防止使用过程中部件锈蚀,影响寿命。目前铁塔构件常用的处理方式是先在先镀锌然后再进行表面钝化处理,目前常用的钝化液中一般都含有铬等重金属元素,这类钝化液使用之后产生的废液中重金属超标,进行无害化处理的 成本很高,除此之外铁塔构件表面钝化层中的铬元素随着时间的推移也会逐渐进入周围环境中,对铁塔周围的环境造成一定程度的重金属污染。
发明内容
本发明主要解决的技术问题是提供一种钝化液,能够降低重金属环境污染。
为解决上述技术问题,本发明采用的一个技术方案是:提供种一种铁塔构件用无铬哑光钝化液,,所述铁塔构件用无铬哑光钝化液中各组分浓度如下:
无机成膜剂 0.5~300g/L
有机成膜剂 0.1~50g/L
钝化剂 5~100g/L
哑光剂 0.20~0.25 g/L
其中所述无机成膜剂为硅酸钠、硅酸锂、甲基硅酸钠、甲基硅酸钾中的一种或多种任意比例的混合物;所述有机成膜剂为丙烯酸酯或者水性聚氨酯中的任意一种;所述钝化剂为植酸、鞣酸和酒石酸中一种或多种任意比例的混合物;所述哑光剂为金红石型钛白粉。
在本发明的一个较佳实施例中,所述钝化液中还包括非离子型表面活性剂、聚硅氧烷和羧甲基纤维素中的至少一种。所述非离子型表面活性剂、聚硅氧烷和羧甲基纤维素的添加总量为0.2~0.5g/L。
在本发明的一个较佳实施例中,所述金红石型钛白粉材料粒径D50值为0.20-0.25微米。
在本发明的一个较佳实施例中,所述钝化液的pH值控制值为10.0-13.0,所述钝化液中使用的PH值调节剂为 0.1mol/L的稀磷酸。
在本发明的一个较佳实施例中,所述成膜剂中使用的丙烯酸树脂或水性聚氨酯为有机硅改性丙烯酸树脂或者有机硅改性聚氨酯。
为解决上述技术问题,本发明采用的另一个技术方案是:提供一种铁塔构件用无铬哑光钝化液的使用方法,所述使用方法包括以下步骤:
(1)将经过表面处理之后的铁塔构件移入高温锌池中浸镀;浸镀温度为400~500℃,浸镀时间为1~10min;
(2)将浸镀后的铁塔构件冷却至100℃~250℃之间,然后将带有余热的铁塔构件快速放进所述无铬哑光钝化液中浸没5秒~100秒;
(3)将经过步骤(2)钝化处理之后的铁塔构件送入漂洗池中漂洗,去除残留钝化液后送入干燥室干燥。
在本发明的一个较佳实施例中,所述步骤(3)中漂洗池分为两段,其中前段为预洗池,后段为清洗池,清洗池中废液用作预洗池中洗液。
在本发明的一个较佳实施例中,所述步骤(2)中冷却方式为对风冷,冷却时间为0.5~5min。
在本发明的一个较佳实施例中,所述步骤(2)中干燥方式为热风干燥,干燥温度为60~80℃。
本发明的有益效果是:本发明中所述的钝化液除了具有常规钝化液的优良防腐性能之外,还具有良好的哑光功能,可以有效消解入射光想,免去了后续哑光漆涂附工序,而且形成的钝化膜不会破坏铁塔构件上的镀锌层,对铁塔构件表面具有一定的物理防护功能。除此之外,整个钝化液的配方体系中没有重金属元素,降低了生产中废水处理的压力,而且,铁塔在长期使用过程中,不会对周围环境造成污染,可以满足现在越来越严苛的环保要求。
具体实施方式
下面对本发明的较佳实施例进行详细阐述,以使本发明的优点和特征能更易于被本领域技术人员理解,从而对本发明的保护范围做出更为清楚明确的界定。
本发明实施内容包括:
本发明在实际应用中各组分浓度如下:
无机成膜剂 0.5~300g/L
有机成膜剂 0.1~50g/L
钝化剂 5~100g/L
哑光剂 0.20~0.25
其中无机成膜剂为硅酸钠、硅酸锂、甲基硅酸钠、甲基硅酸钾中的一种或多种任意比例的混合物;有机成膜剂为丙烯酸酯或者水性聚氨酯中的任意一种;钝化剂为植酸、鞣酸和酒石酸中一种或多种任意比例的混合物;所述哑光剂为金红石型钛白粉。在此配方中,无机成膜剂与有机成膜剂配合可以在金属表面形成以丙烯酸酯或者水性聚氨酯为骨架,结合结合碱金属硅酸盐水解后形成的二氧化硅凝胶组成防护膜主体,其中植酸具有很强的螯合力,可以与锌离子形成不溶性化合物,而鞣酸和酒石酸为羧基酸,可以与金属元素络合,这三者皆可代替铬元素在钝化液中的作用,而其中作为哑光剂添加的金红石型钛白粉,粒径D50值为0.20-0.25微米,具有稳定的晶型和良好的折射率,可以显著提高钝化膜层的光线衍射能力,从而有效降低膜面光泽。
所述钝化液中还包括非离子型表面活性剂、聚硅氧烷和羧甲基纤维素中的至少一种。所述非离子型表面活性剂、聚硅氧烷和羧甲基纤维素的添加总量为0.2~0.5g/L。其中非离子型表面活性剂主要是用来水的表面张力,提高其钛白粉的悬浮性能,聚硅氧烷,具有良好的消泡能力,减少溶液中的浮沫,而羧甲基纤维素可以促进溶液的成膜速度。
所述钝化液的pH值控制值为10.0-13.0,所述钝化液中使用的PH值调节剂为0.1mol/L的稀磷酸。控制其PH值在酸性范围内的原因是如果在碱性条件下,钝化剂会发生中和反应而失效。
所述成膜剂中使用的丙烯酸树脂或水性聚氨酯为有机硅改性丙烯酸树脂或者有机硅改性聚氨酯,通过有机硅改性,一方面可以提高整个膜层的环境耐受力,另一方面,提高了有机膜层与无机膜层之间的结合力度。
一种适用于权利要求1-6任一之一所述的铁塔构件用无铬哑光钝化液的钝化方法,所述钝化方法包括以下步骤:
(1)将经过表面处理之后的铁塔构件移入高温锌池中浸镀;浸镀温度为400~500℃,浸镀时间为1~10min。
(2)将浸镀后的铁塔构件风冷至150℃~250℃之间,然后将带有余热的铁塔构件快速放进所述无铬哑光钝化液中浸没5秒~100秒,
(3)将经过步骤(2)钝化处理之后的铁塔构件送入漂洗池中漂洗,去除残留钝化液后送入干燥室使用60~80℃的热风干燥。
所述步骤(2)中风冷至150℃~250℃之间的目的是在铁塔构件快速浸入无铬哑光钝化液中时可以利用表面余热快速干燥与其直接接触的钝化液,形成钝化膜,所述余热温度不能过大,温度过大,容易造成有机组分分解,导致膜体强度下降,温度过低,则成膜速度慢,效果差,因此此处不能使用水冷。
所述步骤(3)中漂洗池分为两段,其中前段为预洗池,后段为清洗池,清洗池中废液用作预洗池中洗液,这样洗液可以循环使用,降低废水的排放量,减少运行成本。
本发明的实际实施例如下:
实施例1
硅酸钠 300g/L
有机硅改性丙烯酸酯 0.1g/L
钝化剂 5g/L
钛白粉 0.20g/L
混合添加剂 0.50g/L
所述钝化剂为植酸与酒石酸按照2:1的比例混合的共混物,所述混合添加剂是非离子型表面活性剂与聚硅氧烷和羧甲基纤维素按照1:1:1的比例混合的共混物。
实施例2
甲基硅酸钾 0.5g/L
有机硅改性水性聚氨酯 50g/L
钝化剂 100g/L
钛白粉 0.25
混合添加剂 0.20g/L
所述钝化剂为鞣酸,所述混合添加剂是非离子型表面活性剂与聚硅氧烷和羧甲基纤维素按照1:1:1的比例混合的共混物。
实施例3
硅酸钠 100g/L
有机硅改性丙烯酸酯 30g/L
钝化剂 60g/L
钛白粉 0.25 g/L
混合添加剂 0.50g/L
所述钝化剂为植酸与酒石酸按照1:1的比例混合的共混物,所述混合添加剂是非离子型表面活性剂与聚硅氧烷和羧甲基纤维素按照1:1:1的比例混合的共混物。
上述3个实施例在实际生产中均有应用,其中实施例1的哑光效果最好,其中实施例2的哑光颜色相对更亮,同等条件下,实施例3的抗腐蚀能力更强。
以上所述仅为本发明的实施例,并非因此限制本发明的专利范围,凡是利用本发明说明书内容所作的等效结构或等效流程变换,或直接或间接运用在其他相关的技术领域,均同理包括在本发明的专利保护范围内。
Claims (10)
1.一种铁塔构件用无铬哑光钝化液,其特征在于,所述铁塔构件用无铬哑光钝化液中各组分浓度如下:
无机成膜剂 0.5~300g/L
有机成膜剂 0.1~50g/L
钝化剂 5~100g/L
哑光剂 0.20~0.25
其中所述无机成膜剂为硅酸钠、硅酸锂、甲基硅酸钠、甲基硅酸钾中的一种或多种任意比例的混合物;
所述有机成膜剂为丙烯酸酯或者水性聚氨酯中的任意一种;
所述钝化剂为植酸、鞣酸和酒石酸中一种或多种任意比例的混合物;
所述哑光剂为金红石型钛白粉。
2.根据权利要求1所述的铁塔构件用无铬哑光钝化液,其特征在于,所述钝化液中还包括非离子型表面活性剂、聚硅氧烷和羧甲基纤维素中的至少一种。
3.根据权利要求2所述的铁塔构件用无铬哑光钝化液,其特征在于,所述非离子型表面活性剂、聚硅氧烷和羧甲基纤维素的添加总量为0.2~0.5g/L。
4.根据权利要求1所述的铁塔构件用无铬哑光钝化液,其特征在于,所述金红石型钛白粉材料粒径D50值为0.20-0.25微米。
5.根据权利要求1所述的铁塔构件用无铬哑光钝化液,其特征在于,所述钝化液的pH值控制值为10.0-13.0,所述钝化液中使用的PH值调节剂为 0.1mol/L的稀磷酸。
6.根据权利要求1所述的铁塔构件用无铬哑光钝化液,其特征在于,所述成膜剂中使用的丙烯酸树脂或水性聚氨酯为有机硅改性丙烯酸树脂或者有机硅改性聚氨酯。
7.一种适用于权利要求1-6任一之一所述的铁塔构件用无铬哑光钝化液的钝化方法,所述钝化方法包括以下步骤:
(1)将经过表面处理之后的铁塔构件移入高温锌池中浸镀;浸镀温度为400~500℃,浸镀时间为1~10min,
(2)将浸镀后的铁塔构件冷却至100℃~250℃之间,然后将带有余热的铁塔构件快速放进所述无铬哑光钝化液中浸没5秒~100秒,
(3)将经过步骤(2)钝化处理之后的铁塔构件送入漂洗池中漂洗,去除残留钝化液后送入干燥室干燥。
8.根据权利要求7所述的钝化方法,其特征在于,所述步骤(3)中漂洗池分为两段,其中前段为预洗池,后段为清洗池,清洗池中废液用作预洗池中洗液。
9.根据权利要求7所述的钝化方法,其特征在于,所述步骤(2)中冷却方式为对风冷,冷却时间为0.5~5min。
10.根据权利要求7所述的钝化方法,其特征在于,所述步骤(2)中干燥方式为热风干燥,干燥温度为60~80℃。
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