CN101096764B - Partial electroplating and electroless plating process for chemical etching of aluminum or aluminum-copper composite radiator - Google Patents
Partial electroplating and electroless plating process for chemical etching of aluminum or aluminum-copper composite radiator Download PDFInfo
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- CN101096764B CN101096764B CN200710028894A CN200710028894A CN101096764B CN 101096764 B CN101096764 B CN 101096764B CN 200710028894 A CN200710028894 A CN 200710028894A CN 200710028894 A CN200710028894 A CN 200710028894A CN 101096764 B CN101096764 B CN 101096764B
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- 238000000034 method Methods 0.000 title claims abstract description 42
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 35
- WPPDFTBPZNZZRP-UHFFFAOYSA-N aluminum copper Chemical compound [Al].[Cu] WPPDFTBPZNZZRP-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 239000002131 composite material Substances 0.000 title claims abstract description 28
- 238000009713 electroplating Methods 0.000 title claims abstract description 14
- 238000003486 chemical etching Methods 0.000 title claims abstract description 11
- 238000007772 electroless plating Methods 0.000 title claims description 8
- 229910001096 P alloy Inorganic materials 0.000 claims abstract description 24
- 238000007747 plating Methods 0.000 claims abstract description 24
- OFNHPGDEEMZPFG-UHFFFAOYSA-N phosphanylidynenickel Chemical compound [P].[Ni] OFNHPGDEEMZPFG-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000005246 galvanizing Methods 0.000 claims abstract description 15
- 239000000126 substance Substances 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 238000005406 washing Methods 0.000 claims description 26
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 19
- 239000000243 solution Substances 0.000 claims description 18
- 238000005530 etching Methods 0.000 claims description 15
- 230000003647 oxidation Effects 0.000 claims description 14
- 238000007254 oxidation reaction Methods 0.000 claims description 14
- 239000002253 acid Substances 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 239000007800 oxidant agent Substances 0.000 claims description 9
- 239000003513 alkali Substances 0.000 claims description 8
- 230000007797 corrosion Effects 0.000 claims description 8
- 238000005260 corrosion Methods 0.000 claims description 8
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 238000005554 pickling Methods 0.000 claims description 5
- 230000001590 oxidative effect Effects 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 4
- 238000012805 post-processing Methods 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical group OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 3
- 150000001412 amines Chemical class 0.000 claims description 3
- 239000004327 boric acid Substances 0.000 claims description 3
- 239000004312 hexamethylene tetramine Substances 0.000 claims description 3
- 235000010299 hexamethylene tetramine Nutrition 0.000 claims description 3
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 18
- 229910052759 nickel Inorganic materials 0.000 abstract description 9
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 14
- 239000011701 zinc Substances 0.000 description 14
- 229910052725 zinc Inorganic materials 0.000 description 14
- 238000004140 cleaning Methods 0.000 description 10
- 238000007598 dipping method Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 3
- 238000005238 degreasing Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 125000005619 boric acid group Chemical group 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
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Abstract
本发明涉及铝或铝铜复合散热器的电镀、化学镀工艺技术领域，特指一种铝或铝铜复合散热器化学刻蚀的局部电镀、化学镀工艺，本发明是在对散热器进行浸锌工艺之前对散热器进行化学氧化、封闭和局部化学刻蚀，即仅在铝或铝铜复合散热器与主机相连的部位镀上一层具有可焊性的镍磷合金，该工艺由于仅在欲施镀的铝散热器或铝铜复合散热器的部位施镀，因此称为局部镀，该工艺可应用于铝散热器或铝铜复合散热器的局部镀，本发明工艺简单，易于实现，节省镍资源，降低产品成本。
The present invention relates to the technical field of electroplating and chemical plating processes for aluminum or aluminum-copper composite radiators, and in particular to a local electroplating and chemical plating process for chemical etching of aluminum or aluminum-copper composite radiators. The present invention is to chemically oxidize, seal and locally chemically etch the radiator before the galvanizing process is performed on the radiator, that is, a layer of nickel-phosphorus alloy with weldability is plated only at the portion where the aluminum or aluminum-copper composite radiator is connected to the host. Since the process is only plated at the portion of the aluminum radiator or aluminum-copper composite radiator to be plated, it is called local plating. The process can be applied to the local plating of aluminum radiators or aluminum-copper composite radiators. The process of the present invention is simple, easy to implement, saves nickel resources and reduces product costs.
Description
技术领域：Technical field:
本发明涉及铝或铝铜复合散热器的电镀、化学镀工艺技术领域，特指一种铝或铝铜复合散热器化学刻蚀的局部电镀、化学镀工艺。The invention relates to the technical field of electroplating and chemical plating processes for aluminum or aluminum-copper composite radiators, in particular to a partial electroplating and chemical plating process for chemical etching of aluminum or aluminum-copper composite radiators.
背景技术：Background technique:
铝散热器是由许多铝片经机械加工叠在一起而形成的散热器，而铝铜复合散热器则由铜导热管紧密穿插在铝散热器中而形成的散热器。由于铝的可焊性能差，为了使上述的铝散热器或铝铜复合散热器与需散热的主机相连，需要在铝散热器或铝铜复合散热器与主机相连的部位镀上一层具有可焊性的镍磷合金，以便将两者焊接在一起。The aluminum radiator is a radiator formed by stacking many aluminum sheets through machining, while the aluminum-copper composite radiator is a radiator formed by tightly interspersing copper heat pipes in the aluminum radiator. Due to the poor weldability of aluminum, in order to connect the above-mentioned aluminum radiator or aluminum-copper composite radiator to the host that needs heat dissipation, it is necessary to coat the part where the aluminum radiator or aluminum-copper composite radiator is connected to the host. Weldable nickel-phosphorus alloy to weld the two together.
而铝的表面易形成自然氧化膜，这层氧化膜不利于铝的电镀或化学镀，为了能在铝的表面上电镀或化学镀，铝材需进行镀前处理，目前比较常用的镀前处理工艺为二次浸锌工艺，目前普通化学镀镍磷合金工艺见附图1，其步骤简叙如下：The surface of aluminum is easy to form a natural oxide film, which is not conducive to the electroplating or chemical plating of aluminum. In order to be electroplated or chemically plated on the surface of aluminum, the aluminum material needs to be pre-plated. At present, the pre-plating treatment is more commonly used The process is a secondary galvanizing process. At present, the common electroless nickel-phosphorus alloy plating process is shown in Figure 1. The steps are briefly described as follows:
第1步、除油，除去散热器表面的油污；Step 1, degreasing, remove the oil on the surface of the radiator;
第2步、水洗，对散热器进行清洗；Step 2, washing with water, cleaning the radiator;
第3步、弱腐蚀，将散热器投入碱液中，对散热器的表面进行弱腐蚀；Step 3, weak corrosion, put the radiator into the lye, and weakly corrode the surface of the radiator;
第4步、水洗，对散热器进行清洗；Step 4, washing with water, cleaning the radiator;
第5步、出光，将散热器投入酸液中，进行出光；Step 5, emit light, put the radiator into the acid solution, and emit light;
第6步、水洗，对散热器进行清洗；Step 6, washing with water, cleaning the radiator;
第7步、一次浸锌，将散热器投入含锌酸盐的碱液中，进行一次浸锌；Step 7, one-time zinc dipping, put the radiator into the lye containing zincate, and perform one-time zinc dipping;
第8步、水洗，对散热器进行清洗；Step 8, washing with water, cleaning the radiator;
第9步、退锌，将散热器投入酸液中，进行退锌；Step 9, zinc stripping, put the radiator into the acid solution, and strip zinc;
第10步、水洗，对散热器进行清洗；Step 10, wash with water, and clean the radiator;
第11步、二次浸锌，将散热器投入含锌酸盐的碱液中，进行二次浸锌；Step 11, the second zinc immersion, the radiator is put into the lye containing zincate, and the second zinc immersion is carried out;
第12步、水洗，对散热器进行清洗；Step 12, wash with water, and clean the radiator;
第13步、镀镍磷合金，将散热器投入化学镀镍槽中，在散热器表面镀上镍磷合金；Step 13, nickel-phosphorus alloy plating, put the radiator into the electroless nickel plating tank, and plate nickel-phosphorus alloy on the surface of the radiator;
第14步、水洗，对散热器进行清洗；Step 14, wash with water, and clean the radiator;
第15步、吹干；Step 15, blow dry;
第16步、烘干；Step 16, drying;
第17步、成品。Step 17, finished product.
上述工艺流程简化为：前处理1、浸锌2、镀镍磷合金、后处理3、成品。The above technological process is simplified as follows: pretreatment 1, galvanizing 2, nickel-phosphorus alloy plating, post-treatment 3, finished product.
散热器经由上述化学镀镍磷合金工艺施镀后，或者经过电镀后，铝散热器或铝铜复合散热器整体都镀上了镍磷合金，包括散热器的焊接面和非焊接面，散热器的非焊接面是不需施镀的，而镍磷合金的成本较高，致使散热器的成本居高不下。After the radiator is plated by the above electroless nickel-phosphorus alloy plating process, or after electroplating, the aluminum radiator or aluminum-copper composite radiator is plated with nickel-phosphorus alloy as a whole, including the welding surface and non-welding surface of the radiator. The non-welding surface of the radiator does not need to be plated, and the cost of the nickel-phosphorus alloy is relatively high, resulting in a high cost of the radiator.
发明内容：Invention content:
本发明的目的在于针对现有技术的不足提供一种铝或铝铜复合散热器化学刻蚀的局部电镀、化学镀工艺，该种工艺只对散热器需施镀的部位进行化学镀或电镀，工艺简单，易于实现，节省镍资源，降低产品成本。The object of the present invention is to provide a local electroplating and electroless plating process for chemical etching of aluminum or aluminum-copper composite radiators in view of the deficiencies in the prior art. The process is simple and easy to implement, saving nickel resources and reducing product costs.
为实现上述目的，本发明是通过以下技术方案实现的：它包括以下步骤：To achieve the above object, the present invention is achieved through the following technical solutions: it comprises the following steps:
第1步、对散热器进行前处理，其是依次对散热器进行除油、水洗、弱腐蚀(利用碱液对其进行弱腐蚀)、水洗、出光(酸洗)、水洗；Step 1. Carry out pretreatment to the radiator, which is to degrease, wash, weakly corrode (weakly corrode it with lye), wash, light (pickling), and wash the radiator in sequence;
第2步、化学氧化，将散热器投入含有氧化剂的热水中，氧化后散热器的表面覆盖一层无色的多孔氧化膜，采用的氧化剂为有机胺类，所述的热水的温度为80-95℃，氧化时间为8-30分钟；氧化后覆盖在散热器表面的多孔氧化膜的厚度为0.5-5微米；The 2nd step, chemical oxidation, put radiator into the hot water that contains oxidant, the surface of radiator after oxidation is covered with a colorless porous oxide film, the oxidant that adopts is organic amines, and the temperature of described hot water is 80-95°C, the oxidation time is 8-30 minutes; the thickness of the porous oxide film covering the surface of the radiator after oxidation is 0.5-5 microns;
第3步、水洗，对散热器进行清洗；Step 3, washing with water, cleaning the radiator;
第4步、封闭(填充)，将散热器投入含封闭剂的水溶液中，经封闭后，散热器表面的多孔氧化膜的孔穴被封闭剂填满，散热器表面形成一层耐酸和碱的腐蚀的氧化膜，采用的封闭剂为硼酸，水溶液的温度为85-95℃，封闭时间为8-30分钟；Step 4, sealing (filling), put the radiator into the aqueous solution containing the sealing agent, after sealing, the pores of the porous oxide film on the surface of the radiator are filled by the sealing agent, and a layer of acid and alkali corrosion resistance is formed on the surface of the radiator For the oxide film, the sealing agent used is boric acid, the temperature of the aqueous solution is 85-95°C, and the sealing time is 8-30 minutes;
第5步、水洗，对散热器进行清洗；Step 5, washing with water, cleaning the radiator;
第6步、局部化学刻蚀，将散热器需施镀的部位浸入在刻蚀溶液中进行局部刻蚀，散热器被刻蚀的部位露出基材，而未刻蚀的部位仍覆盖一层氧化膜，采用氢氧化钠溶液为刻蚀溶液，所述的刻蚀溶液的温度为60-70℃，刻蚀时间为2-5分钟；Step 6, local chemical etching, immerse the part of the radiator to be plated in the etching solution for partial etching, the etched part of the radiator exposes the substrate, while the unetched part is still covered with a layer of oxide For the film, sodium hydroxide solution is used as the etching solution, the temperature of the etching solution is 60-70°C, and the etching time is 2-5 minutes;
第7步、水洗，对散热器进行清洗；Step 7, washing with water, cleaning the radiator;
第8步、出光(酸液)；Step 8, Idemitsu (acid solution);
第9步、水洗，对散热器进行清洗；Step 9, wash with water, and clean the radiator;
第10步、浸锌，其是依次对散热器进行一次浸锌、水洗、酸洗退锌、水洗、二次浸锌、水洗；Step 10, galvanizing, which is to carry out one-time galvanizing, water washing, pickling and dezincification, water washing, secondary galvanizing, and water washing to the radiator in turn;
第11步、镀镍磷合金，对散热器进行化学镀或电镀，散热器上只有被刻蚀的部位被镀上镍磷合金；Step 11, nickel-phosphorus alloy plating, electroless plating or electroplating on the radiator, only the etched parts on the radiator are plated with nickel-phosphorus alloy;
第12步、后处理，其是依次对散热器进行水洗、吹干、烘干；The 12th step, post-processing, it is to wash radiator successively, dry, dry;
第13步、成品。Step 13, the finished product.
在第2步的化学氧化中，所述的氧化剂为三乙醇胺或者六次甲基四胺(乌洛托品)。In the second step of chemical oxidation, the oxidizing agent is triethanolamine or hexamethylenetetramine (urotropine).
从上述技术方案中可以看出，为了节省镍资源，申请人开发出局部镀工艺，本发明是在对散热器进行浸锌工艺之前对散热器进行化学氧化、封闭和局部化学刻蚀，即仅在铝或铝铜复合散热器与主机相连的部位镀上一层具有可焊性的镍磷合金，该工艺由于仅在欲施镀的铝或铝铜复合散热器的部位施镀，因此称为局部镀，该工艺可应用于铝散热器或铝铜复合散热器的局部镀。综上所述，本发明工艺只对散热器需施镀的部位进行化学镀或电镀，工艺简单，易于实现，节省镍资源，降低产品成本。It can be seen from the above technical scheme that in order to save nickel resources, the applicant has developed a partial plating process. The present invention is to chemically oxidize, seal and partially chemically etch the radiator before carrying out the zinc dipping process on the radiator, that is, only A layer of weldable nickel-phosphorus alloy is plated on the part where the aluminum or aluminum-copper composite radiator is connected to the main engine. This process is only applied to the part of the aluminum or aluminum-copper composite radiator to be plated, so it is called Partial plating, this process can be applied to partial plating of aluminum radiators or aluminum-copper composite radiators. In summary, the process of the present invention only performs electroless plating or electroplating on the parts of the radiator that need to be plated. The process is simple, easy to implement, saves nickel resources, and reduces product costs.
附图说明：Description of drawings:
附图1为目前散热器镀镍的工艺流程图；Accompanying drawing 1 is the process flow chart of radiator nickel plating at present;
附图2为本发明的工艺流程图。Accompanying drawing 2 is process flow chart of the present invention.
具体实施方式：Detailed ways:
为进一步揭示本发明，以下结合附图2及具体实施例进行说明，它包括以下步骤：In order to further disclose the present invention, below in conjunction with accompanying drawing 2 and specific embodiment illustrate, it comprises the following steps:
第1步、对散热器进行前处理，其是依次对散热器进行除油、水洗、弱腐蚀(利用碱液对其进行弱腐蚀)、水洗、出光(酸洗)、水洗；本发明前处理中各个步骤的工艺与目前前处理常用的处理工艺相同；The 1st step, carry out pretreatment to radiator, it is to carry out degreasing, water washing, weak corrosion (using lye to carry out weak corrosion to it), water washing, light emitting (pickling), water washing to radiator successively; Pretreatment of the present invention The process of each step in the process is the same as the current pre-treatment process commonly used;
第2步、化学氧化，将散热器投入含有氧化剂的热水中，所述的氧化剂为有机胺类，氧化剂为三乙醇胺或者六次甲基四胺(乌洛托品)等；氧化后散热器的表面覆盖一层无色的多孔氧化膜；其中，所述的热水的温度为80-95℃，氧化时间为8-30分钟；氧化后覆盖在散热器表面的多孔氧化膜的厚度为0.5-5微米；The 2nd step, chemical oxidation, put radiator into the hot water that contains oxidizing agent, described oxidizing agent is organic amines, and oxidizing agent is triethanolamine or hexamethylenetetramine (urotropine) etc.; Radiator after oxidation The surface of the radiator is covered with a layer of colorless porous oxide film; wherein, the temperature of the hot water is 80-95°C, and the oxidation time is 8-30 minutes; the thickness of the porous oxide film covering the surface of the radiator after oxidation is 0.5 -5 microns;
第3步、水洗，对散热器进行清洗；Step 3, washing with water, cleaning the radiator;
第4步、封闭(填充)，将散热器投入含封闭剂的水溶液中，所述的封闭剂为硼酸，水溶液的温度为85-95℃，封闭时间为8-30分钟；经封闭后，散热器表面的多孔氧化膜的孔穴被封闭剂填满，散热器表面形成一层耐酸和碱的腐蚀的氧化膜；Step 4, sealing (filling), put the radiator into an aqueous solution containing a sealing agent, the sealing agent is boric acid, the temperature of the aqueous solution is 85-95°C, and the sealing time is 8-30 minutes; after sealing, heat dissipation The pores of the porous oxide film on the surface of the radiator are filled by the sealing agent, and an oxide film resistant to acid and alkali corrosion is formed on the surface of the radiator;
由于第2步中在散热器表面所形成的该层多孔氧化膜不耐酸和碱的腐蚀，在浸锌液中由于碱的腐蚀，铝散热器或铝铜复合散热器的基体便会沉积上一层锌，这样覆盖有锌层的铝散热器或铝铜复合散热器在化学镀镍槽中便会镀上镍磷合金；为了使多孔氧化膜耐酸碱，必须将该层多孔氧化膜的孔穴用充填物填满，使之耐酸碱，这工序称之为封闭；Since the layer of porous oxide film formed on the surface of the radiator in the second step is not resistant to acid and alkali corrosion, due to the corrosion of alkali in the zinc dipping solution, the substrate of the aluminum radiator or the aluminum-copper composite radiator will deposit a Zinc layer, so that the aluminum radiator or aluminum-copper composite radiator covered with zinc layer will be plated with nickel-phosphorus alloy in the electroless nickel plating tank; in order to make the porous oxide film resistant to acid and alkali, the pores of the porous oxide film must be Fill it with fillers to make it resistant to acid and alkali, this process is called sealing;
第5步、水洗，对散热器进行清洗；Step 5, washing with water, cleaning the radiator;
第6步、局部化学刻蚀，将散热器需施镀的部位浸入在刻蚀溶液中进行局部刻蚀，所述的刻蚀溶液为氢氧化钠溶液，刻蚀溶液的温度为60-70℃，刻蚀时间为2-5分钟；散热器被刻蚀的部位露出基材，而未刻蚀的部位仍覆盖一层氧化膜；Step 6, local chemical etching, immersing the part of the radiator to be plated in an etching solution for partial etching, the etching solution is sodium hydroxide solution, and the temperature of the etching solution is 60-70°C , the etching time is 2-5 minutes; the etched part of the heat sink exposes the substrate, while the unetched part is still covered with an oxide film;
由于经封闭后的多孔氧化膜耐酸碱，铝散热器或铝铜复合散热器在浸锌液中不会沉积上锌，在化学镀镍槽中也不会镀上镍磷合金；为了要使铝散热器或铝铜复合散热器与主机相连的部位能镀上一层具有可焊性的镍磷合金，必须用化学刻蚀的方法将铝散热器或铝铜复合散热器与主机相连的部位的多孔氧化膜除去，露出铝散热器或铝铜复合散热器的基材，因为铝散热器或铝铜复合散热器上的多孔氧化膜仅局部的除去，该工序便称局部化学刻蚀；Since the closed porous oxide film is resistant to acid and alkali, the aluminum radiator or aluminum-copper composite radiator will not deposit zinc in the zinc dipping solution, nor will it be plated with nickel-phosphorus alloy in the electroless nickel plating tank; The part where the aluminum radiator or aluminum-copper composite radiator is connected to the host can be plated with a layer of nickel-phosphorus alloy with solderability, and the part where the aluminum radiator or aluminum-copper composite radiator is connected to the host must be chemically etched The porous oxide film is removed to expose the base material of the aluminum radiator or the aluminum-copper composite radiator, because the porous oxide film on the aluminum radiator or the aluminum-copper composite radiator is only partially removed, and this process is called local chemical etching;
第7步、水洗，对散热器进行清洗；Step 7, washing with water, cleaning the radiator;
第8步、出光(酸液)，该工艺与现有的出光工艺相同；The 8th step, light emitting (acid liquid), this process is identical with existing light emitting process;
第9步、水洗，对散热器进行清洗；Step 9, wash with water, and clean the radiator;
第10步、浸锌，其是依次对散热器进行一次浸锌、水洗、酸洗退锌、水洗、二次浸锌、水洗；本步骤的工艺与目前常用的二次浸锌工艺相同，经浸锌后铝散热器或铝铜复合散热器上有氧化膜的部位不会沉积上锌，而经第6步刻蚀的部位则会沉积上一层锌；The 10th step, galvanizing, it is to carry out one-time galvanizing, water washing, pickling dezincification, water washing, secondary galvanizing, water washing to radiator successively; Zinc will not be deposited on the parts of the aluminum radiator or aluminum-copper composite radiator with oxide film after galvanizing, but a layer of zinc will be deposited on the parts etched in step 6;
第11步、镀镍磷合金，对散热器进行化学镀或电镀，该步骤工艺与现有镀镍工艺相同，散热器上只有被刻蚀的部位被镀上镍磷合金，其它部位不会被镀上镍磷合金；Step 11, nickel-phosphorus alloy plating, electroless plating or electroplating on the radiator, the process of this step is the same as the existing nickel plating process, only the etched part of the radiator is plated with nickel-phosphorus alloy, and other parts will not be plated Plated with nickel-phosphorus alloy;
第12步、后处理，其是依次对散热器进行水洗、吹干、烘干；The 12th step, post-processing, it is to wash radiator successively, dry, dry;
第13步、成品。Step 13, the finished product.
经本发明的工艺后，铝散热器或铝铜复合散热器与主机相连的部位镀上一层具有可焊性的镍磷合金，其它部位不镀上镍磷合金，铝散热器或铝铜复合散热器只有局部镀，工艺简单，节约镍磷合金。After the process of the present invention, a layer of nickel-phosphorus alloy with weldability is plated on the part where the aluminum radiator or aluminum-copper composite radiator is connected to the main engine, and the other parts are not plated with nickel-phosphorus alloy, aluminum radiator or aluminum-copper composite radiator. The radiator is only partially plated, the process is simple, and the nickel-phosphorus alloy is saved.
本发明的工艺是现有工艺的基础上，在对其进行浸锌工艺前，对散热器进行局部刻蚀，该工艺流程简化为：前处理1、局部化学刻蚀2、浸锌3、化学镀镍磷合金、后处理4、成品。The process of the present invention is on the basis of the existing process, before carrying out the galvanizing process, the heat sink is partially etched, and the process flow is simplified as follows: pretreatment 1, local chemical etching 2, galvanizing 3, chemical Nickel-plating phosphorus alloy, post-processing 4, finished product.
以上所述仅是本发明的较佳实施例，故凡依本发明专利申请范围所述的构造、特征及原理所做的等效变化或修饰，均包括于本发明专利申请范围内。The above are only preferred embodiments of the present invention, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.
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| EP1767663A1 (en) * | 2005-09-23 | 2007-03-28 | Nederlandse Organisatie voor toegepast-natuurwetenschappelijk Onderzoek TNO | Method for partially metallizing a product |
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| 陈奎儒.一种新型的局部化学镀保护方法.腐蚀与防护26 11.2005,26(11),488-489. |
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