WO2017214781A1 - 无铬免洗皮膜剂、铝材及其表面皮膜化处理方法 - Google Patents
无铬免洗皮膜剂、铝材及其表面皮膜化处理方法 Download PDFInfo
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- WO2017214781A1 WO2017214781A1 PCT/CN2016/085510 CN2016085510W WO2017214781A1 WO 2017214781 A1 WO2017214781 A1 WO 2017214781A1 CN 2016085510 W CN2016085510 W CN 2016085510W WO 2017214781 A1 WO2017214781 A1 WO 2017214781A1
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- Prior art keywords
- parts
- chromium
- free
- agent
- film
- Prior art date
Links
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 40
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 239000011248 coating agent Substances 0.000 title claims abstract description 40
- 239000000463 material Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000000576 coating method Methods 0.000 title claims abstract description 16
- 239000004411 aluminium Substances 0.000 title abstract 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 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 12
- 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 12
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 12
- 229940068041 phytic acid Drugs 0.000 claims abstract description 12
- 235000002949 phytic acid Nutrition 0.000 claims abstract description 12
- 239000000467 phytic acid Substances 0.000 claims abstract description 12
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 12
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 12
- 235000015393 sodium molybdate Nutrition 0.000 claims abstract description 12
- 239000011684 sodium molybdate Substances 0.000 claims abstract description 12
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 claims abstract description 12
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims abstract description 9
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052700 potassium Inorganic materials 0.000 claims abstract description 9
- 239000011591 potassium Substances 0.000 claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 34
- 238000002161 passivation Methods 0.000 claims description 2
- 230000003064 anti-oxidating effect Effects 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 8
- 229910001430 chromium ion Inorganic materials 0.000 abstract description 3
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 2
- 238000005406 washing Methods 0.000 abstract 1
- 238000004381 surface treatment Methods 0.000 description 9
- 230000007935 neutral effect Effects 0.000 description 5
- 239000003973 paint Substances 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 239000004615 ingredient Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 235000007686 potassium Nutrition 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- -1 stirred Substances 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
- C23C22/40—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
- C23C22/42—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 containing also phosphates
Definitions
- the present invention relates to the field of metal surface treatment technology, and in particular, to a chromium-free disposable filming agent, an aluminum material, and a surface filming treatment method thereof.
- the surface treatment technology of the workpiece is usually applied.
- the surface treatment of aluminum, iron and their alloys goes deep into all walks of life.
- most of the work needs to be pretreated before surface treatment, for example, cleaning, decontamination and degreasing, and some applications of aluminum need to be filmed.
- the filming treatment generally uses a filming agent to pretreat the aluminum material to form a film layer on the surface of the aluminum material for subsequent surface treatment, thereby increasing the adhesion and corrosion resistance of the subsequent film.
- a filming agent to pretreat the aluminum material to form a film layer on the surface of the aluminum material for subsequent surface treatment, thereby increasing the adhesion and corrosion resistance of the subsequent film.
- a corrosion-free, strong adhesion-free chromium-free disposable film agent, and an aluminum surface filming treatment method and an aluminum material obtained by the film treatment are provided, and the coating agent is environmentally friendly.
- a chromium-free disposable filming agent for surface treatment of aluminum comprising 1000 parts by weight, including the following parts by weight: 5-50 parts of phytic acid, 2-20 parts of sodium molybdate or Potassium molybdate, 2-10 parts of silica, 2-10 parts of polyvinyl alcohol and the balance water.
- a method for processing a surface of an aluminum material comprising the steps of: formulating a chromium-free disposable film agent as described above; formulating a chromium-free disposable film agent into a film having a mass percentage of 40-60% Solution; control the pH of the coating solution to 2-5; apply the coating solution to the surface of the aluminum and dry.
- an aluminum material having a surface formed by a surface treatment method of an aluminum material as described above Membrane having a surface formed by a surface treatment method of an aluminum material as described above Membrane.
- the film formed by the above chromium-free disposable film agent has good corrosion resistance, can be used as a coating treatment bottom layer, and is processed by an aluminum material, which is directly roll-coated, is not washed with water, and is very convenient to use, and the film agent does not contain damage.
- the environment's chromium ions and other heavy metals are green products that comply with the EU ROHS Directive.
- An embodiment of the present invention provides a chromium-free disposable film agent for surface treatment of aluminum, comprising 1000 parts by weight, including the following parts by weight: 5-50 parts of phytic acid, 2-20 parts Sodium molybdate or potassium molybdate, 2-10 parts of silica, 2-10 parts of polyvinyl alcohol and the balance water.
- the phytic acid is preferably 10-20 parts by weight.
- the sodium molybdate or potassium molybdate is preferably 5 to 10 parts by weight.
- the silica is preferably used in an amount of 2 to 6 parts by weight.
- the polyvinyl alcohol is preferably 2 to 6 parts by weight.
- the coating agent has a rhodium ratio of 40 to 60% by weight and a pH of preferably 2 to 5, which is weakly acidic.
- phytic acid, sodium molybdate or potassium molybdate is the main component of the film, and silica and polyvinyl alcohol make the film firm and uniform.
- An embodiment of the present invention further provides a method for treating a surface of an aluminum material, comprising the steps of: formulating a chromium-free disposable film agent as described above; and formulating the chromium-free disposable film agent into a mass percentage 40-60% of the film solution; control the pH of the film solution to 2-5; apply the film solution to the surface of the aluminum and dry.
- the mass percentage of the coating agent in the coating agent solution is preferably 45-50%, and the crucible is directly applied to the surface of the aluminum, and the extrusion method may also be employed.
- the treatment temperature is normal temperature, such as 20-25 degrees.
- the surface of the aluminum material is further subjected to passivation, oxidation resistance or coating treatment.
- the drying temperature is controlled at about 80 degrees, and should not be too high to prevent cracks in the film.
- Embodiments of the present invention also provide an aluminum material which is treated by a surface treatment method of an aluminum material as described above to form a film on the surface of the aluminum material.
- the film protects the aluminum material and can be used as a coating treatment layer. For easy processing such as subsequent painting.
- ingredients are mixed according to the following parts by weight (total weight: 1000 parts): 5 parts of phytic acid, 2 parts of sodium molybdate, 2 parts of silica, 2 parts of polyvinyl alcohol and the balance of water, stirred, uniformly mixed, formulated A film forming agent.
- Treatment method preparing a chromium-free disposable filming agent; formulating a chromium-free disposable filming agent into a film solution having a mass percentage of 50%; controlling the pH of the coating agent solution to be 3; at normal temperature, The film solution was applied to the surface of the aluminum and dried at 80 degrees.
- the components are mixed according to the following parts by weight (total weight: 1000 parts): 10 parts of phytic acid, 5 parts of sodium molybdate, 4 parts of silica, 4 parts of polyvinyl alcohol and the balance of water, stirred, uniformly mixed, formulated A film forming agent.
- treatment method preparing a chromium-free disposable film agent; the chromium-free disposable film agent is formulated into a film solution having a mass percentage of 50%; controlling the pH of the film solution is 3; at normal temperature, The film solution was applied to the surface of the aluminum and dried at 80 degrees.
- the ingredients are mixed in the following parts by weight (total weight: 1000 parts): 15 parts of phytic acid, 5 parts of sodium molybdate, 6 parts of silica, 6 parts of polyvinyl alcohol and the balance of water, stirred, uniformly mixed, formulated A film forming agent.
- treatment method preparing a chromium-free disposable film agent; the chromium-free disposable film agent is formulated into a film solution having a mass percentage of 50%; controlling the pH of the film solution is 3; at normal temperature, The film solution was applied to the surface of the aluminum and dried at 80 degrees.
- the ingredients are mixed in the following parts by weight (total weight: 1000 parts): 20 parts of phytic acid, 10 parts of sodium molybdate or Potassium molybdate, 6 parts of silica, 6 parts of polyvinyl alcohol and the balance of water, stirred, uniformly mixed, formulated into a filming agent.
- Treatment method preparing a chromium-free disposable filming agent; preparing a chromium-free disposable filming agent into a film solution having a mass percentage of 50%; controlling the pH of the coating agent solution to be 3; at normal temperature, The film solution was applied to the surface of the aluminum and dried at 80 degrees.
- the ingredients are mixed in the following parts by weight (total weight: 1000 parts): 30 parts of phytic acid, 20 parts of sodium molybdate or potassium molybdate, 8 parts of silica, 8 parts of polyvinyl alcohol and the balance of water, stirred, Mix well and prepare a filming agent.
- Treatment method preparing a chromium-free disposable filming agent; preparing a chromium-free disposable filming agent into a film solution having a mass percentage of 50%; controlling the pH of the coating agent solution to be 3; at normal temperature, The film solution was applied to the surface of the aluminum and dried at 80 degrees.
Abstract
一种无铬免洗皮膜剂、铝材及其表面皮膜化处理方法。无铬免洗皮膜剂用于铝材表面预处理，以1000重量份计，包括如下重量份数的成分：5-50份植酸，2-20份的钼酸钠或钼酸钾，2-10份硅石，2-10份聚乙烯醇和余量水。该无铬免洗皮膜剂形成的膜层耐蚀性好，可作为涂装处理底层，处理铝材时，直接滚涂上去，不用水洗，使用起来非常方便，该皮膜剂不含损害环境的铬离子及其它重金属，是一种绿色环保产品，符合欧盟ROHS指令。
Description
发明名称：无铬免洗皮膜剂、 铝材及其表面皮膜化处理方法 技术领域
[0001] 本发明涉及金属表面处理技术领域， 具体涉及一种无铬免洗皮膜剂、 铝材及其 表面皮膜化处理方法。
背景技术
[0002] 为提高产品表面性能或者外观， 通常对工件表面处理技术。 例如， 铝、 铁及其 合金的表面处理工艺深入各行各业中。 而且， 大多数工作在进行表面处理前还 需要经过预处理， 例如， 进行清洗， 除污除油， 某些用途的铝材还需要进行皮 膜化处理。
[0003] 皮膜化处理一般采用皮膜剂对铝材进行预处理， 以在铝材表面形成膜层， 以便 进行后续的表面处理， 增加后续膜的结合力和防腐力。 传统皮膜一般皮膜处理 后都需要用清水清洗， 或者含铬离子， 不能满足环保需求跟一些商家的工艺要 求。
技术问题
[0004] 有鉴于此， 提供一种耐蚀性好、 结合力强的无铬免洗皮膜剂， 以及铝材表面皮 膜化处理方法和经过皮膜化处理后制得的铝材， 此皮膜剂环保无毒， 工艺简便 ， 皮膜后无须水洗。
问题的解决方案
技术解决方案
[0005] 一种无铬免洗皮膜剂， 用于铝材表面预处理， 以 1000重量份计， 包括如下重量 份数的成分： 5-50份植酸， 2-20份的钼酸钠或钼酸钾， 2-10份硅石， 2-10份聚乙 烯醇和余量水。
[0006] 一种铝材表面皮膜化处理方法， 其包括下列步骤： 配制如上所述的无铬免洗皮 膜剂； 将无铬免洗皮膜剂配制成质量百分含量为 40-60%的皮膜溶液； 控制皮膜 剂溶液的 PH值为 2-5; 将皮膜溶液涂于铝材表面， 烘干。
[0007] 以及， 一种铝材， 其表面具有通过如上所述的铝材表面皮膜化处理方法形成的
皮膜。
发明的有益效果
有益效果
[0008] 上述无铬免洗皮膜剂形成的膜层耐蚀性好， 可作为涂装处理底层， 处理铝材吋 ， 直接滚涂上去， 不用水洗， 使用起来非常方便， 该皮膜剂不含损害环境的铬 离子及其它重金属， 是一种绿色环保产品， 符合欧盟 ROHS指令。
本发明的实施方式
[0009] 以下将结合具体实施例对本发明进行详细说明。
[0010] 本发明实施例提供一种无铬免洗皮膜剂， 用于铝材表面预处理， 以 1000重量份 计， 包括如下重量份数的成分： 5-50份植酸， 2-20份的钼酸钠或钼酸钾， 2-10份 硅石， 2-10份聚乙烯醇和余量水。
[0011] 具体地， 所述植酸的重量份数优选为 10-20份。 所述钼酸钠或钼酸钾的重量份 数优选为 5-10份。 所述硅石的重量份数优选为 2-6份。 所述聚乙烯醇的重量份数 优选为 2-6份。 所述皮膜剂使用吋的配比为 40-60wt%， PH值优选为 2-5， 呈弱酸 性。
[0012] 在上述无铬免洗皮膜剂中， 通过控制各成分配比平衡， 以达到较佳成膜效果。
例如， 植酸、 钼酸钠或钼酸钾为膜层主要成分， 硅石和聚乙烯醇使膜层坚固和 均匀。
[0013] 本发明实施例还提供一种铝材表面皮膜化处理方法， 其包括下列步骤： 配制如 上所述的无铬免洗皮膜剂； 将无铬免洗皮膜剂配制成质量百分含量为 40-60%的 皮膜溶液； 控制皮膜剂溶液的 PH值为 2-5; 将皮膜溶液涂于铝材表面， 烘干。
[0014] 具体地， 皮膜剂溶液中皮膜剂的质量百分含量优选为 45-50%， 处理吋， 直接辊 涂到铝材表面上去， 也可采用挤压方式。 处理温度为常温， 如 20-25度。 另外， 在形成皮膜后， 进一步对铝材表面进行钝化、 抗氧化或涂装处理。 烘干温度控 制在 80度左右， 不宜过高， 防止膜层出现裂痕。
[0015] 本发明实施例还提供一种铝材， 其通过如上所述的铝材表面皮膜化处理方法进 行处理， 在铝材表面形成皮膜。 皮膜可对铝材进行保护， 可作为涂装处理底层
， 便于后续涂装等处理。
[0016] 以下通过具体实例说明本发明实施例的无铬免洗皮膜剂及其处理方法等方面。
[0017] 实施例 1
[0018] 按照下列重量份数混合各成分 (总重量为 1000份)： 5份植酸， 2份的钼酸钠， 2 份硅石， 2份聚乙烯醇和余量水， 搅拌， 混合均匀， 配制成皮膜剂。
[0019] 处理方法： 配制好无铬免洗皮膜剂； 将无铬免洗皮膜剂配制成质量百分含量为 50%的皮膜溶液； 控制皮膜剂溶液的 PH值为 3; 在常温下， 将皮膜溶液涂于铝材 表面， 在 80度下烘干。
[0020] 经过上述皮膜剂溶液处理后， 发现工件耐腐蚀性大大提高， 中性盐雾测试达 48 小吋以上， 油漆涂装后附着力明显提高。
[0021] 实施例 2
[0022] 按照下列重量份数混合各成分 (总重量为 1000份)： 10份植酸， 5份的钼酸钠， 4 份硅石， 4份聚乙烯醇和余量水， 搅拌， 混合均匀， 配制成皮膜剂。
[0023] 处理方法： 配制好无铬免洗皮膜剂； 将无铬免洗皮膜剂配制成质量百分含量为 50%的皮膜溶液； 控制皮膜剂溶液的 PH值为 3; 在常温下， 将皮膜溶液涂于铝材 表面， 在 80度下烘干。
[0024] 经过上述皮膜剂溶液处理后， 发现工件耐腐蚀性大大提高， 中性盐雾测试达 52 小吋以上， 油漆涂装后附着力明显提高。
[0025] 实施例 3
[0026] 按照下列重量份数混合各成分 (总重量为 1000份)： 15份植酸， 5份的钼酸钠， 6 份硅石， 6份聚乙烯醇和余量水， 搅拌， 混合均匀， 配制成皮膜剂。
[0027] 处理方法： 配制好无铬免洗皮膜剂； 将无铬免洗皮膜剂配制成质量百分含量为 50%的皮膜溶液； 控制皮膜剂溶液的 PH值为 3; 在常温下， 将皮膜溶液涂于铝材 表面， 在 80度下烘干。
[0028] 经过上述皮膜剂溶液处理后， 发现工件耐腐蚀性大大提高， 中性盐雾测试达 60 小吋以上， 油漆涂装后附着力明显提高。
[0029] 实施例 4
[0030] 按照下列重量份数混合各成分 (总重量为 1000份)： 20份植酸， 10份的钼酸钠或
钼酸钾， 6份硅石， 6份聚乙烯醇和余量水， 搅拌， 混合均匀， 配制成皮膜剂。
[0031] 处理方法： 配制好无铬免洗皮膜剂； 将无铬免洗皮膜剂配制成质量百分含量为 50%的皮膜溶液； 控制皮膜剂溶液的 PH值为 3 ; 在常温下， 将皮膜溶液涂于铝材 表面， 在 80度下烘干。
[0032] 经过上述皮膜剂溶液处理后， 发现工件耐腐蚀性大大提高， 中性盐雾测试达 62 小吋以上， 油漆涂装后附着力明显提高。
[0033] 实施例 5
[0034] 按照下列重量份数混合各成分 (总重量为 1000份)： 30份植酸， 20份的钼酸钠或 钼酸钾， 8份硅石， 8份聚乙烯醇和余量水， 搅拌， 混合均匀， 配制成皮膜剂。
[0035] 处理方法： 配制好无铬免洗皮膜剂； 将无铬免洗皮膜剂配制成质量百分含量为 50%的皮膜溶液； 控制皮膜剂溶液的 PH值为 3 ; 在常温下， 将皮膜溶液涂于铝材 表面， 在 80度下烘干。
[0036] 经过上述皮膜剂溶液处理后， 发现工件耐腐蚀性大大提高， 中性盐雾测试达 64 小吋以上， 油漆涂装后附着力明显提高。
[0037] 需要说明的是， 本发明并不局限于上述实施方式， 根据本发明的创造精神， 本 领域技术人员还可以做出其他变化， 这些依据本发明的创造精神所做的变化， 都应包含在本发明所要求保护的范围之内。
Claims
[权利要求 1] 一种无铬免洗皮膜剂， 用于铝材表面预处理， 其特征在于， 以 1000重 量份计， 包括如下重量份数的成分： 5-50份植酸， 2-20份的钼酸钠或 钼酸钾， 2-10份硅石， 2-10份聚乙烯醇和余量水。
[权利要求 2] 如权利要求 1所述的无铬免洗皮膜剂， 其特征在于， 所述植酸的重量 份数为 10-30份。
[权利要求 3] 如权利要求 1所述的无铬免洗皮膜剂， 其特征在于， 所述钼酸钠或钼 酸钾的重量份数为 5-10份。
[权利要求 4] 如权利要求 1所述的无铬免洗皮膜剂， 其特征在于， 所述硅石的重量 份数为 2-6份。
[权利要求 5] 如权利要求 1所述的无铬免洗皮膜剂， 其特征在于， 所述聚乙烯醇的 重量份数为 2-6份。
[权利要求 6] 如权利要求 1所述的无铬免洗皮膜剂， 其特征在于， 所述皮膜剂使用 配比为 40-60wt<¾。
[权利要求 7] 如权利要求 1所述的无铬免洗皮膜剂， 其特征在于， 所述皮膜剂的 PH 值为 2-5。
[权利要求 8] 一种铝材表面皮膜化处理方法， 其包括下列步骤： 配制如权利要求 1- 7任一项所述的无铬免洗皮膜剂； 将无铬免洗皮膜剂配制成质量百分 含量为 40-60%的皮膜溶液； 控制皮膜剂溶液的 PH值为 2-5; 将皮膜溶 液涂于铝材表面， 烘干。
[权利要求 9] 一种铝材， 其特征在于， 所述铝材表面通过如权利要求 8所述的铝材 表面皮膜化处理方法形成有皮膜。
[权利要求 10] 如权利要求 9所述的铝材， 其特征在于， 在形成皮膜后， 进一步对铝 材表面进行钝化、 抗氧化或涂装处理。
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