CN114606548A - 一种汽车铝合金表面改性工艺 - Google Patents
一种汽车铝合金表面改性工艺 Download PDFInfo
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000012986 modification Methods 0.000 title claims abstract description 11
- 230000004048 modification Effects 0.000 title claims abstract description 11
- 238000000576 coating method Methods 0.000 claims abstract description 61
- 239000011248 coating agent Substances 0.000 claims abstract description 60
- 238000004544 sputter deposition Methods 0.000 claims abstract description 43
- 239000013077 target material Substances 0.000 claims abstract description 29
- 239000002131 composite material Substances 0.000 claims abstract description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 12
- 239000010439 graphite Substances 0.000 claims abstract description 12
- 230000003647 oxidation Effects 0.000 claims abstract description 12
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 12
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 30
- 238000000137 annealing Methods 0.000 claims description 24
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 20
- 238000005238 degreasing Methods 0.000 claims description 20
- 238000005498 polishing Methods 0.000 claims description 20
- 238000005554 pickling Methods 0.000 claims description 19
- 238000001755 magnetron sputter deposition Methods 0.000 claims description 12
- 244000137852 Petrea volubilis Species 0.000 claims description 10
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 10
- 238000007743 anodising Methods 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 235000006408 oxalic acid Nutrition 0.000 claims description 10
- 238000001291 vacuum drying Methods 0.000 claims description 10
- 238000005406 washing Methods 0.000 claims description 10
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical group [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- 239000012298 atmosphere Substances 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 3
- 239000000758 substrate Substances 0.000 abstract 1
- 239000012300 argon atmosphere Substances 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000013213 extrapolation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
- C25D11/10—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing organic acids
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/0021—Reactive sputtering or evaporation
- C23C14/0036—Reactive sputtering
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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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/0635—Carbides
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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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/35—Sputtering by application of a magnetic field, e.g. magnetron sputtering
- C23C14/352—Sputtering by application of a magnetic field, e.g. magnetron sputtering using more than one target
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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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/58—After-treatment
- C23C14/5806—Thermal treatment
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
- C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/16—Pretreatment, e.g. desmutting
Abstract
本发明涉及一种汽车铝合金表面改性工艺。本发明以Ta‑Zr复合靶材和石墨靶材为溅射源,在阳极氧化处理后的汽车铝合金基材表面共溅射沉积TaZrC涂层。通过优化工艺参数,当复合靶材中Ta的质量含量为18‑37%时,可使TaZrC涂层的表面硬度超过14GPa并且自腐蚀电流密度小于1*10‑6A·cm‑2。该改性工艺流程简单,效果卓越,可以极大程度地提高汽车铝合金的综合表面性能。
Description
技术领域
本发明涉及涂层材料领域,具体涉及一种汽车铝合金表面改性工艺。
背景技术
铝的相对密度是2.7*103kg/m3,铝的机械性能与其纯度密切相关,纯铝软、强度低,但与某些金属组成铝合金后,不仅在某种程度上保留了铝固有的特点,同时又显著地提高了它的硬度和强度,使之可与钢材的性能相媲美。车用铝材皆以铝合金的形式出现,铝合金在汽车上的应用最初主要是以铸造的方法生产发动机及其零部件,随后应用于轮毂等构件,已推出的全铝空间框架式车身为其主要代表。随着汽车用铝合金的应用越来越广泛,对其表面硬度和耐腐蚀性能提出了更高的要求,因此,如何得到综合性能优异的汽车铝合金材料是当下的热门研究课题。
发明内容
针对现有技术存在的问题,本发明旨在提供一种汽车铝合金表面改性工艺,通过该工艺可以获得硬度和耐腐蚀性能都优异的铝合金表面TaZrC涂层。
一种汽车铝合金表面改性工艺,其特征在于,所述改性工艺包括以下步骤:
对汽车铝合金进行抛光、酸洗、脱脂和水洗处理后,放入真空干燥箱中烘干待用,其中酸洗选用15-18%的HCl溶液,脱脂选用18-20%的Na2CO3溶液;将铝合金放入0.3-0.5mol/L的草酸和0.2-0.3mol/L的磷酸溶液中,在25-30℃和30-35V的条件下阳极氧化3-4h,再用砂纸打磨去除表面疏松的氧化层;将带有阳极氧化层的铝合金放入磁控溅射镀膜设备中,对镀膜设备抽真空,以Ta-Zr复合靶材和石墨靶材为溅射源,在惰性气氛下制备TaZrC涂层,其中溅射压力为3.0-5.0Pa,溅射温度为200-220℃,溅射时间90-120min,所述复合靶材中Ta的质量含量为18-37%;对铝合金表面TaZrC涂层进行真空退火处理。
优选地,所述真空退火处理的退火温度为310℃,退火时间为3h。
优选地,磁控溅射过程中通过调节靶材功率使TaZrC涂层中碳的质量含量为13-15%。
优选地,所述惰性气氛为氩气。
优选地,所述靶材的纯度超过99.9%。
本发明以Ta-Zr复合靶材和石墨靶材为溅射源,在阳极氧化处理后的汽车铝合金基材表面共溅射沉积TaZrC涂层。通过优化工艺参数,当复合靶材中Ta的质量含量为18-37%时,可使TaZrC涂层的表面硬度超过14GPa并且自腐蚀电流密度小于1*10-6A·cm-2。该改性工艺流程简单,效果卓越,可以极大程度地提高汽车铝合金的综合表面性能。
具体实施方式
下面通过具体实施例来验证本发明的技术效果,但是本发明的实施方式不局限于此。
实施例1
对汽车铝合金进行抛光、酸洗、脱脂和水洗处理后,放入真空干燥箱中烘干待用,其中酸洗选用15%的HCl溶液,脱脂选用20%的Na2CO3溶液;将上述铝合金放入0.3mol/L的草酸和0.2mol/L的磷酸溶液中,在25℃和30V的条件下阳极氧化3h,再用砂纸打磨去除表面疏松的氧化层;将带有阳极氧化层的铝合金放入磁控溅射镀膜设备中,对镀膜设备抽真空,以Ta-Zr复合靶(复合靶材中Ta的质量含量为18%)和石墨靶为溅射源,在氩气气氛下制备TaZrC涂层,其中溅射压力为3.0Pa,溅射温度为220℃,溅射时间90min,通过调节靶材功率使TaZrC涂层中碳的质量含量为13%;对铝合金表面TaZrC涂层进行真空退火处理,退火温度310℃,退火时间3h。
实施例2
对汽车铝合金进行抛光、酸洗、脱脂和水洗处理后,放入真空干燥箱中烘干待用,其中酸洗选用15%的HCl溶液,脱脂选用20%的Na2CO3溶液;将上述铝合金放入0.3mol/L的草酸和0.2mol/L的磷酸溶液中,在25℃和30V的条件下阳极氧化3h,再用砂纸打磨去除表面疏松的氧化层;将带有阳极氧化层的铝合金放入磁控溅射镀膜设备中,对镀膜设备抽真空,以Ta-Zr复合靶(复合靶材中Ta的质量含量为21%)和石墨靶为溅射源,在氩气气氛下制备TaZrC涂层,其中溅射压力为3.0Pa,溅射温度为220℃,溅射时间90min,通过调节靶材功率使TaZrC涂层中碳的质量含量为13%;对铝合金表面TaZrC涂层进行真空退火处理,退火温度310℃,退火时间3h。
实施例3
对汽车铝合金进行抛光、酸洗、脱脂和水洗处理后,放入真空干燥箱中烘干待用,其中酸洗选用15%的HCl溶液,脱脂选用20%的Na2CO3溶液;将上述铝合金放入0.3mol/L的草酸和0.2mol/L的磷酸溶液中,在25℃和30V的条件下阳极氧化3h,再用砂纸打磨去除表面疏松的氧化层;将带有阳极氧化层的铝合金放入磁控溅射镀膜设备中,对镀膜设备抽真空,以Ta-Zr复合靶(复合靶材中Ta的质量含量为25%)和石墨靶为溅射源,在氩气气氛下制备TaZrC涂层,其中溅射压力为3.0Pa,溅射温度为220℃,溅射时间90min,通过调节靶材功率使TaZrC涂层中碳的质量含量为13%;对铝合金表面TaZrC涂层进行真空退火处理,退火温度310℃,退火时间3h。
实施例4
对汽车铝合金进行抛光、酸洗、脱脂和水洗处理后,放入真空干燥箱中烘干待用,其中酸洗选用15%的HCl溶液,脱脂选用20%的Na2CO3溶液;将上述铝合金放入0.3mol/L的草酸和0.2mol/L的磷酸溶液中,在25℃和30V的条件下阳极氧化3h,再用砂纸打磨去除表面疏松的氧化层;将带有阳极氧化层的铝合金放入磁控溅射镀膜设备中,对镀膜设备抽真空,以Ta-Zr复合靶(复合靶材中Ta的质量含量为29%)和石墨靶为溅射源,在氩气气氛下制备TaZrC涂层,其中溅射压力为3.0Pa,溅射温度为220℃,溅射时间90min,通过调节靶材功率使TaZrC涂层中碳的质量含量为13%;对铝合金表面TaZrC涂层进行真空退火处理,退火温度310℃,退火时间3h。
实施例5
对汽车铝合金进行抛光、酸洗、脱脂和水洗处理后,放入真空干燥箱中烘干待用,其中酸洗选用15%的HCl溶液,脱脂选用20%的Na2CO3溶液;将上述铝合金放入0.3mol/L的草酸和0.2mol/L的磷酸溶液中,在25℃和30V的条件下阳极氧化3h,再用砂纸打磨去除表面疏松的氧化层;将带有阳极氧化层的铝合金放入磁控溅射镀膜设备中,对镀膜设备抽真空,以Ta-Zr复合靶(复合靶材中Ta的质量含量为33%)和石墨靶为溅射源,在氩气气氛下制备TaZrC涂层,其中溅射压力为3.0Pa,溅射温度为220℃,溅射时间90min,通过调节靶材功率使TaZrC涂层中碳的质量含量为13%;对铝合金表面TaZrC涂层进行真空退火处理,退火温度310℃,退火时间3h。
实施例6
对汽车铝合金进行抛光、酸洗、脱脂和水洗处理后,放入真空干燥箱中烘干待用,其中酸洗选用15%的HCl溶液,脱脂选用20%的Na2CO3溶液;将上述铝合金放入0.3mol/L的草酸和0.2mol/L的磷酸溶液中,在25℃和30V的条件下阳极氧化3h,再用砂纸打磨去除表面疏松的氧化层;将带有阳极氧化层的铝合金放入磁控溅射镀膜设备中,对镀膜设备抽真空,以Ta-Zr复合靶(复合靶材中Ta的质量含量为37%)和石墨靶为溅射源,在氩气气氛下制备TaZrC涂层,其中溅射压力为3.0Pa,溅射温度为220℃,溅射时间90min,通过调节靶材功率使TaZrC涂层中碳的质量含量为13%;对铝合金表面TaZrC涂层进行真空退火处理,退火温度310℃,退火时间3h。
对比例1
对汽车铝合金进行抛光、酸洗、脱脂和水洗处理后,放入真空干燥箱中烘干待用,其中酸洗选用15%的HCl溶液,脱脂选用20%的Na2CO3溶液;将上述铝合金放入0.3mol/L的草酸和0.2mol/L的磷酸溶液中,在25℃和30V的条件下阳极氧化3h,再用砂纸打磨去除表面疏松的氧化层;将带有阳极氧化层的铝合金放入磁控溅射镀膜设备中,对镀膜设备抽真空,以Ta-Zr复合靶(复合靶材中Ta的质量含量为5%)和石墨靶为溅射源,在氩气气氛下制备TaZrC涂层,其中溅射压力为3.0Pa,溅射温度为220℃,溅射时间90min,通过调节靶材功率使TaZrC涂层中碳的质量含量为13%;对铝合金表面TaZrC涂层进行真空退火处理,退火温度310℃,退火时间3h。
对比例2
对汽车铝合金进行抛光、酸洗、脱脂和水洗处理后,放入真空干燥箱中烘干待用,其中酸洗选用15%的HCl溶液,脱脂选用20%的Na2CO3溶液;将上述铝合金放入0.3mol/L的草酸和0.2mol/L的磷酸溶液中,在25℃和30V的条件下阳极氧化3h,再用砂纸打磨去除表面疏松的氧化层;将带有阳极氧化层的铝合金放入磁控溅射镀膜设备中,对镀膜设备抽真空,以Ta-Zr复合靶(复合靶材中Ta的质量含量为50%)和石墨靶为溅射源,在氩气气氛下制备TaZrC涂层,其中溅射压力为3.0Pa,溅射温度为220℃,溅射时间90min,通过调节靶材功率使TaZrC涂层中碳的质量含量为13%;对铝合金表面TaZrC涂层进行真空退火处理,退火温度310℃,退火时间3h。
接下来,我们对实施例1-6以及对比例1-2的涂层硬度及耐腐蚀性能进行测试。
其中,硬度测试采用MTS生产的Nano-indenter G200纳米压痕仪对TaZrC涂层做纳米压入实验,得到涂层的硬度数据,实验选用Berkovich三棱锥金刚石压头,压入深度不超过涂层厚度的10%;
耐腐蚀性能测试选用CHI660E电化学工作站,使用三电极体系,测试前先用石蜡将样品密封,只露出样品的待测表面,保证待测面的形状为正方形,将待测试样放入5%的NaCl溶液中30min后,开始测试,利用Tafel外推法计算样品自腐蚀电流密度。
各样品的实验数据如表1所示,其中硬度大于14GPa以及自腐蚀电流密度小于1*10-6被认为是令人满意的结果,并以此为标准评判涂层产品是否合格。
表1各样品的试验结果
编号 | 硬度/GPa | 自腐蚀电流密度/A·cm<sup>-2</sup> | 是否合格 |
实施例1 | 18.72 | 5.29*10<sup>-7</sup> | √ |
实施例2 | 18.24 | 4.97*10<sup>-7</sup> | √ |
实施例3 | 17.54 | 4.37*10<sup>-7</sup> | √ |
实施例4 | 17.01 | 3.81*10<sup>-7</sup> | √ |
实施例5 | 15.21 | 3.16*10<sup>-7</sup> | √ |
实施例6 | 14.22 | 2.67*10<sup>-7</sup> | √ |
对比例1 | 19.30 | 5.52*10<sup>-6</sup> | × |
对比例2 | 12.06 | 8.10*10<sup>-8</sup> | × |
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明技术原理的前提下,还可以做出若干改进和变型,这些改进和变型也应视为本发明的保护范围。
Claims (5)
1.一种汽车铝合金表面改性工艺,其特征在于,所述改性工艺包括以下步骤:
对汽车铝合金进行抛光、酸洗、脱脂和水洗处理后,放入真空干燥箱中烘干待用,其中酸洗选用15-18%的HCl溶液,脱脂选用18-20%的Na2CO3溶液;将铝合金放入0.3-0.5mol/L的草酸和0.2-0.3mol/L的磷酸溶液中,在25-30℃和30-35V的条件下阳极氧化3-4h,再用砂纸打磨去除表面疏松的氧化层;将带有阳极氧化层的铝合金放入磁控溅射镀膜设备中,对镀膜设备抽真空,以Ta-Zr复合靶材和石墨靶材为溅射源,在惰性气氛下制备TaZrC涂层,其中溅射压力为3.0-5.0Pa,溅射温度为200-220℃,溅射时间90-120min,所述复合靶材中Ta的质量含量为18-37%;对铝合金表面TaZrC涂层进行真空退火处理。
2.一种如权利要求1所述汽车铝合金表面改性工艺,其特征在于,所述真空退火处理的退火温度为310℃,退火时间为3h。
3.一种如权利要求1-2所述汽车铝合金表面改性工艺,其特征在于,磁控溅射过程中通过调节靶材功率使TaZrC涂层中碳的质量含量为13-15%。
4.一种如权利要求1所述汽车铝合金表面改性工艺,其特征在于,所述惰性气氛为氩气。
5.一种如权利要求1所述汽车铝合金表面改性工艺,其特征在于,所述靶材的纯度超过99.9%。
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