CN102268631A - Copper inner wall of a seamless pre-passivated surface treatment process - Google Patents

Copper inner wall of a seamless pre-passivated surface treatment process Download PDF

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CN102268631A
CN102268631A CN 201110185201 CN201110185201A CN102268631A CN 102268631 A CN102268631 A CN 102268631A CN 201110185201 CN201110185201 CN 201110185201 CN 201110185201 A CN201110185201 A CN 201110185201A CN 102268631 A CN102268631 A CN 102268631A
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inner wall
copper tube
pre
gas
copper
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CN 201110185201
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张永靖
梁理秋
王焰磊
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广东龙丰精密铜管有限公司
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Abstract

本发明提供了一种无缝光面铜管内壁预钝化处理工艺,其技术解决方案为:将铜管内壁清洗干净;在保护气体保护下,将铜管加热至不低于400℃;往铜管内通入氧化性气体;对铜管以200~300℃/s的速度进行强制冷却;用干燥、洁净的压缩空气或者氧气与惰性气体的混合气体,对铜管内壁进行吹扫。 The present invention provides a seamless copper tube inner wall surface passivation pre-treatment process, which technical solutions: The cleaned copper tube inner wall; protected under protective gas, the copper tube is heated to not lower than 400 deg.] C; To oxidizing gas introduced into the copper tube; copper pipe at a speed of 200 ~ 300 ℃ / s forced cooling; dried, mixed gas of clean compressed air or oxygen with an inert gas, the inner wall of the copper tube was purged. 使用本发明方法对铜管内壁进行预钝化处理,可使铜管内壁生成一层均匀致密的氧化膜,同时保持外表面光亮;本方法处理成本低,效果好,容易实现规模化生产。 Using the method of the invention the inner wall of the pre-passivation treatment brass, brass inner wall can generate a uniform dense oxide film, while maintaining the outer surface of the light; the present method of treatment of low cost, effective, easy to implement large-scale production. 所制得铜管内壁具有的良好的防腐特性,可以提高铜管在液、气中的使用寿命;还可以防止内部产生有害物质,保证输送流体不受管道污染,保留了铜管的优良性能。 The prepared copper tube inner wall has good corrosion properties, the service life can be improved brass liquid gas; and it can prevent internal harmful substances from the fluid transport conduit to ensure that contamination, retains excellent performance copper pipe.

Description

一种无缝光面铜管内壁预钝化处理工艺 Copper inner wall of a seamless pre-passivated surface treatment process

技术领域 FIELD

[0001] 本发明涉及铜管表面处理技术领域,尤其是涉及一种无缝光面铜管内壁预钝化处 [0001] The present invention relates to brass surface treatment technologies, and in particular to a seamless copper tube inner wall surface at a pre-passivated

理工艺。 Treatment process.

背景技术 Background technique

[0002] 目前,由于紫铜管自身具有优良的性能而广泛用于供水系统、医疗气管等高要求的项目中。 [0002] Currently, since the copper itself has excellent properties and is widely used in water supply systems projects, the medical tube of high demand. 但由于未经处理的紫铜管内壁自身钝化不佳,在恶劣环境下使用,会发生铜管腐蚀污染输送介质的情况,降低了铜管的使用寿命和使用安全。 However, due to the inner wall of copper untreated poor self-passivation, use in harsh environments, the situation will corrode copper transmission medium pollution occurs, reducing the brass of life and safety. 如铜水管一般使用5年左右的时间就会发生内壁腐蚀,出现所谓的“蓝水”现象,使饮用水中的铜含量远远超过规定的水平。 Such as copper pipes generally use about five years internal corrosion occurs, so-called "blue water" phenomenon, the copper content in drinking water is far more than the prescribed level. 这是由于铜材料对氧化剂的钝化作用弱造成的。 This is because the copper material of the passivation effect due to weak oxidant. 因此不作内壁处理的铜管,在使用寿命和使用安全上大打折扣。 Therefore not deal with the inner wall of brass, on a greatly reduced service life and safety.

[0003] 为了克服铜管材料这一不足,已有的处理方法有:1、内壁化学酸洗:利用铬酸盐和强氧化性酸对铜管内壁进行酸洗、钝化,使铜管内壁形成一层新鲜、完整而清洁的Cu2O 膜,然后配合胶球清洗,再对铜管进行硫酸亚铁造膜处理,形成良好、致密的双层保护膜; 2、内壁覆塑:将塑料管套入经过化学清洗的铜管内壁,以采用旋转式内喷枪或者铜管与喷枪相对旋转的方法,进行热喷涂工艺,将塑料以粉束涂敷到管壁上,利用铜管与塑料之间的膨胀系数差异,经吹胀挤压处理,紧圈吻合而成;3、“SANC0”工艺处理:SANC0®工艺是在生产过程中进行的,即在铜管使用前就对其内壁表面施行了保护,它对铜管拉伸工序的热处理过程有非常严格的技术要求,其中碳纯度值低于欧洲标准的3. 3倍。 [0003] In order to overcome this deficiency brass materials, conventional processing methods: 1, the inner wall of the chemical pickling: using strong oxidizing acids and chromate copper pipe inner wall pickling, passivation, so that the inner wall of brass forming a layer of fresh, complete and clean Cu2O film and then cleaned with gum balls, and then the brass for FeSO4 treatment, to form a good, dense two-layer protective film; 2, the inner wall coating plastic: the plastic sleeve after the chemical cleaning of the inner wall of the copper tube to the spray gun using a rotary method or a relative rotation of the lance brass, thermal spray process, powder beam is applied to the plastic to the wall, between the use of brass and plastic expansion coefficient difference, the inflation extrusion process, anastomosis clamp rings made; 3, "SANC0" process: SANC0® process is carried out in the production process, i.e., to the purposes of the protection of the inner wall surface thereof prior to the use of brass , brass stretching it during the heat treatment step has very strict technical requirements, wherein the carbon purity level is less than 3.3 times the European standard. SANC0®要求碳余量必须小于0. 06毫克/平方分米,而EN1057标准为0. 2毫克/平方分米。 SANC0® claim carbon balance must be less than 0.06 mg / dm, and EN1057 standard 0.2 mg / dm. 碳纯度直接影响到铜管的表面光洁度,凹凸不平就是纯度超标造成的腐蚀现象。 Purity carbon directly affects the surface finish of the brass, uneven corrosion is caused by excessive purity. 化学酸洗法虽然较简单,但要用到铬酸盐、三氧化铬或笨并三氮唑(BTA),还要用到大量的酸如磷酸、硝酸、硫酸、盐酸等, 过程中还会释放出N0X、Cl2氯气等污染物,严重污染环境,已不适合现代生产对环境保护的要求。 Although the chemical pickling process is relatively simple, but to use a chromate, and chromium trioxide or stupid triazole (BTA), you have to use large amount of acid such as phosphoric acid, nitric acid, sulfuric acid or hydrochloric acid, the process will release N0X, Cl2 chlorine and other contaminants, serious pollution of the environment, is not suitable for modern production requirements for environmental protection. 内壁覆塑是在铜管内部涂覆一层保护塑料,虽短时内对铜管有较好的保护作用,但长时间使用下与一般的塑料管道无异,对铜管的特性利用不足。 Plastic coated copper tube inner wall is internally coated with a protective plastic, although in a short time with a better protection of brass, but in general no different from prolonged use of plastic pipe, the characteristics of the copper tube underutilized. “SANC0”工艺实施成本高,工艺复杂,提高了铜管生产成本,不利于推广使用。 "SANC0" high technology implementation costs, process complexity, increase the cost of copper production, is not conducive to the promotion of the use.

发明内容 SUMMARY

[0004] 本发明涉及铜管表面处理技术领域,尤其是涉及一种无缝光面铜管内壁预钝化处 [0004] The present invention relates to brass surface treatment technologies, and in particular to a seamless copper tube inner wall surface at a pre-passivated

理工艺。 Treatment process.

[0005] 本发明的技术解决方案为:一种无缝光面铜管内壁预钝化工艺,包括以下步骤: [0005] The technical solutions of the present invention is: a seamless copper tube inner wall surface pre-passivation process, comprising the steps of:

(1)将铜管内壁清洗干净; (1) clean the inner wall of the copper tube;

(2)在保护气体保护下,将铜管加热至不低于400°C ; (2) protection under protective gas, the copper tube is heated to not lower than 400 ° C;

(3)往铜管内通入氧化性气体,保温; (3) To a copper tube through the oxidizing gas, heat;

(4)对铜管以200〜300°C /S的速度进行强制冷却; (4) The copper pipe is forcibly cooled at a rate of 200~300 ° C / S in;

(5)用干燥、洁净的压缩空气或者氧气与惰性气体的混合气体,对铜管内壁进行吹扫。 (5) dried, mixed gas of clean compressed air or oxygen with an inert gas, the inner wall of the copper tube was purged. [0006] 优选的:所述的保护气体为氮气或者惰性气体。 [0006] Preferred are: the protective gas is nitrogen or an inert gas.

[0007] 优选的:所述的氧化性气体为干燥、洁净的压缩空气或者氧气与惰性气体的混合气体,所述混合气体中,氧的体积分数为不低于20%。 [0007] The preferred: the oxidizing gas is dry, clean compressed air or a mixed gas of oxygen and an inert gas, the mixed gas, the volume fraction of oxygen is not less than 20%.

[0008] 优选的:强制冷却至目标温度不高于30°C。 [0008] Preferred: forced cooling to a certain temperature not higher than 30 ° C.

[0009] 优选的:将铜管加热至400〜600°C之间。 [0009] preferably: between the copper tube was heated to 400~600 ° C.

[0010] 优选的:保温时间为1〜3S。 [0010] Preferably: the holding time 1~3S.

[0011] 优选的:所述压缩空气或混合气体中,氧的体积分数不高于50%。 [0011] Preferably: the compressed air or the mixed gas, the volume fraction of oxygen is not more than 50%.

[0012] 本发明的有益效果是: [0012] Advantageous effects of the present invention are:

使用本发明方法对铜管内壁进行预钝化处理,可使铜管内壁生成一层均勻致密的氧化膜,同时保持外表面光亮;本方法处理成本低,效果好,容易实现规模化生产。 Using the method of the invention the inner wall of the pre-passivation treatment brass, brass inner wall can generate a uniform dense oxide film, while maintaining the outer surface of the light; the present method of treatment of low cost, effective, easy to implement large-scale production. 在使用过程中已钝化的内壁具有的良好的防腐特性,可以提高铜管在液、气中的使用寿命;处理后的铜管,防止内部产生有害物质,保证输送流体不受管道污染,保留了铜管的优良性能。 In the course of the passivated inner wall has good corrosion properties, the service life can be improved brass liquid gas; the brass treated to prevent internal harmful substances from the fluid transport conduit to ensure that contamination, retention excellent performance copper pipe.

具体实施方式 detailed description

[0013] 此工艺中所生成的氧化膜的厚度至关重要,过薄的氧化膜不能起到保护的作用, 过厚的氧化膜容易脱落,我们认为最佳的厚度应该在1000-1500A之间,此时的铜管内表面应呈亮黄到橙红(赤)之间的颜色,氧化膜基本由坚实致密的Cu2O膜组成。 [0013] The critical thickness of the oxide film generated in this process, the oxide film is too thin does not play a protective role, the oxide film is too thick easily detached, we believe that the optimum thickness should be between 1000-1500A , the inner surface of the copper tube at this time should be a bright yellow to orange color between (red), the oxide film consists essentially of a dense solid film composition Cu2O. 如果氧化膜厚度过厚,铜管内表面呈发黑或深红色,此时氧化膜基本由CuO或疏松的Cu2O组成,使用过程中容易脱落。 If the thickness of the oxide through the thickness of the inner surface was black or dark red brass, at this time the oxide film consists essentially of a composition Cu2O CuO or loose, easily detached during use.

[0014] 这些颜色并不完全是氧化膜的原色,大多是由膜厚度与各色光的波长相近或成一定比例时,发出的相干光的颜色。 [0014] These colors are not entirely primary color of the oxide film, when the most similar or proportional to the film thickness of the wavelength of light and color, the color of the emitted coherent light. 凭颜色可以推测膜的厚度,铜表面膜的厚度与颜色,可参考美国材料与试验学会(ASTM)公布的数据: With color presumed thickness, the thickness of the surface film of copper color of the film, the reference data may American Society for Testing and Materials (ASTM) published by:

Figure CN102268631AD00041

此工艺中用控制铜管温度的方法来控制氧化膜生成的速度和厚度,利用不同的加热温度和加热时间组合,即可获得理想的氧化膜状态。 This process control method used to control the speed of the temperature of the brass and the thickness of the oxide film generated using different combinations of the heating temperature and the heating time, an oxide film to obtain a desired state.

[0015] 实施例: [0015] Example:

(1)将铜管内壁清洗干净; (1) clean the inner wall of the copper tube;

(2)在氮气保护下,将铜管加热至400-600°C ; (2) Under nitrogen, the copper tube was heated to 400-600 ° C;

(3)往铜管内通入干燥、洁净的压缩空气或者氧气与惰性气体的混合气体,保温时间为1 〜3S ; (3) To a dried copper pipe into the mixed gas clean compressed air or oxygen with an inert gas, the holding time is 1 ~3S;

(4)对铜管以250°C /s的速度进行强制冷却; (4) The copper pipe is forcibly cooled at the speed of 250 ° C / s; and

(5)用干燥、洁净的压缩空气或者氧气与惰性气体的混合气体对铜管内壁进行吹扫。 (5) dried, mixed gas of clean compressed air or oxygen with an inert gas purge of the inner wall of the copper pipe.

[0016] 不同的加热温度和加热保温时间组合下处理所得氧化膜颜色: [0016] The different heating temperature and heating holding time under treatment composition resulting oxide film Color:

Figure CN102268631AD00042
Figure CN102268631AD00051

铜管内表面呈亮黄到橙红(赤)之间的颜色时,说明得到的氧化膜均勻,效果良好。 When the inner surface of the copper pipe between the color was bright yellow to orange (red), indicating that a uniform oxide film obtained good results. [0017] 以上是对本发明的较佳实施方式进行了具体说明,但本发明创造并不限于所述实施例,熟悉本领域的技术人员在不违背本发明精神的前提下还可作出种种的等同变形或替换,这些等同的变型或替换均包含在本申请权利要求所限。 [0017] The above is the preferred embodiment of the present invention has been described in detail, but the present invention is not limited to the creation of embodiments, those skilled in the art without departing from the spirit of the present invention may be made of various equivalents modification or replacement, such equivalent variations or substitutions are included in the claims of the present application limited.

Claims (7)

  1. 1. 一种无缝光面铜管内壁预钝化工艺,包括以下步骤:(1)将铜管内壁清洗干净;(2)在保护气体保护下,将铜管加热至不低于400°C ;(3)往铜管内通入氧化性气体,保温;(4)对铜管以200〜300°C /S的速度进行强制冷却;(5)用干燥、洁净的压缩空气或者氧气与惰性气体的混合气体,对铜管内壁进行吹扫。 A seamless copper tube inner wall surface pre-passivation process, comprising the steps of: (1) clean the inner wall of the copper tube; (2) protection under protective gas, the copper tube was heated to 400 ° C or not ; (3) into the copper tube through the oxidizing gas, heat; (4) for forced cooling of the copper pipe at 200~300 ° C / speed S; and (5) with dry, clean compressed air or oxygen with an inert a mixed gas of a gas, the inner wall of the copper tube was purged.
  2. 2.根据权利要求1所述的无缝光面铜管内壁预钝化工艺,其特征在于:所述的保护气体为氮气或者惰性气体。 The seamless copper tube inner wall surface of the pre-passivation process as claimed in claim 1, wherein: said protective gas is nitrogen or an inert gas.
  3. 3.根据权利要求1所述的无缝光面铜管内壁预钝化工艺,其特征在于:所述的氧化性气体为干燥、洁净的压缩空气或者氧气与惰性气体的混合气体,所述混合气体中,氧的体积分数为不低于20%。 The seamless copper tube inner wall surface of the pre-passivation process as claimed in claim 1, wherein: said oxidizing gas is dry, clean compressed air or a mixed gas of oxygen and an inert gas, the mixing gas, the volume fraction of oxygen is not less than 20%.
  4. 4.根据权利要求1所述的无缝光面铜管内壁预钝化工艺,其特征在于:强制冷却至目标温度不高于30°C。 The seamless copper tube inner wall surface of the pre-passivation process as claimed in claim 1, wherein: the forced cooling to a target temperature not higher than 30 ° C.
  5. 5.根据权利要求1所述的无缝光面铜管内壁预钝化工艺,其特征在于:将铜管加热至400〜600°C之间。 The seamless copper tube inner wall surface of the pre-passivation process as claimed in claim 1, wherein: between the copper tube was heated to 400~600 ° C.
  6. 6.根据权利要求1或者5所述的无缝光面铜管内壁预钝化工艺,其特征在于:保温时间为1〜3S。 The seamless copper tube inner wall surface 1 or 5, wherein the pre-passivation process, as claimed in claim wherein: the holding time 1~3S.
  7. 7.根据权利要求3所述的无缝光面铜管内壁预钝化工艺,其特征在于:所述压缩空气或混合气体中,氧的体积分数不高于50%。 The seamless copper tube inner wall surface of the pre-passivation process as claimed in claim 3, wherein: said compressed air or mixed gas, the volume fraction of oxygen is not more than 50%.
CN 201110185201 2011-07-04 2011-07-04 Copper inner wall of a seamless pre-passivated surface treatment process CN102268631A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101060025A (en) * 2007-05-09 2007-10-24 大连信瑞科技有限公司 Manufacturing method of copper-clad aluminum busbar
CN101245456A (en) * 2008-03-21 2008-08-20 田民格;李新春 Prefilming technique for condensator brass pipe of electric power plant with green copperas
CN101250679A (en) * 2008-04-15 2008-08-27 任建国 On-line annealing method and apparatus for rolling copper pipe
CN101267942A (en) * 2005-08-11 2008-09-17 哈尔科尔金属工具有限公司 Multilayer tube assembly and method for producing the same
CN101608882A (en) * 2009-07-22 2009-12-23 瓮福(集团)有限责任公司 Method for cleaning copper tubes of condenser

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101267942A (en) * 2005-08-11 2008-09-17 哈尔科尔金属工具有限公司 Multilayer tube assembly and method for producing the same
CN101060025A (en) * 2007-05-09 2007-10-24 大连信瑞科技有限公司 Manufacturing method of copper-clad aluminum busbar
CN101245456A (en) * 2008-03-21 2008-08-20 田民格;李新春 Prefilming technique for condensator brass pipe of electric power plant with green copperas
CN101250679A (en) * 2008-04-15 2008-08-27 任建国 On-line annealing method and apparatus for rolling copper pipe
CN101608882A (en) * 2009-07-22 2009-12-23 瓮福(集团)有限责任公司 Method for cleaning copper tubes of condenser

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