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你知道镀锌方管的电镀加工的流程吗?

来源:http://www.jnxxjm.com

【 发布于:2018-11-19 16:24:44 】


镀锌方管加工是利用电解的原理,通过金属离子的电解过程在产品表面沉积一层金属或合金层,以改变产品表面物理和化学性能,最终使得镀锌板具有耐磨性、装饰性和耐冲击性等,此外还能够根据具体产品的特殊要求而涂覆某种特定的镀层,如光能性和电磁性镀层等,这样可充分扩大镀锌方矩管的应用领域。

Galvanized square pipe processing is to deposit a metal or alloy layer on the surface of the product through the electrolysis process of metal ions to change the physical and chemical properties of the product surface, and ultimately make the galvanized sheet wearable, decorative and impact-resistant. In addition, it can be coated according to the special requirements of specific products. Certain coatings, such as photoelectric and electromagnetic coatings, can fully expand the application field of galvanized rectangular tubes.

镀锌方矩管生产规格为:方管:20×20×1.3~500×500×16mm;矩形管:20×30×1.3~400×600×16mm .

The production specifications of galvanized rectangular tube are: square tube: 20 x 20 x 1.3-500 x 500 x 16 mm; rectangular tube: 20 x 30 x 1.3-400 x 600 x 16 mm.

镀锌方矩管加工电镀工艺主要有预处理、电镀及镀后处理等过程,镀层的质量取决于材料的电镀过程,而电镀过程又受很多因素的影响,归纳六大因素如下:

The galvanized rectangular tube processing and electroplating process mainly includes pretreatment, electroplating and post-treatment. The quality of the coating depends on the electroplating process of the material, and the electroplating process is affected by many factors. Six factors are summarized as follows:

1、锌含量:锌块的锌纯度越高,其光亮范围越窄,汽车板就更易获得较厚的镀层,镀层中铁含量也会较低;当锌块的纯度太低时,其光亮范围会较宽,要达到规定的锌层厚度就需要更长的时间,这就会导致镀锌层中铁含量较高。

  1. Zinc content: The higher the zinc purity of zinc block is, the narrower the brightness range is, the thicker the coating can be obtained and the lower the iron content in the coating will be. When the zinc block is too low in purity, the brightness range will be wider, and it will take longer to reach the required zinc layer thickness, which will lead to higher iron content in the zinc plating layer. .

  2. 20171219904795.jpg

2、氢氧化钠:氢氧化钠对反应具有双重影响,当其含量太高时,高温操作过程中易出现烧焦现象;而其含量过低时,溶液分散能力较差,这样会降低锌层的质量。

2. Sodium hydroxide: Sodium hydroxide has dual effects on the reaction. When the content of sodium hydroxide is too high, burning phenomenon is easy to occur during high temperature operation. When the content of sodium hydroxide is too low, the dispersibility of solution is poor, which will reduce the quality of zinc layer.

3、铁含量:当铁含量太高时,镀层中的铁会相应较多,会导致产品钝化膜光亮度不足;而铁含量太低则会导致镀锌层中铁含量较低,降低汽车板的耐蚀性,且会导致汽车板表面偏橄榄色。

3. Iron content: When the iron content is too high, the iron content in the coating will correspondingly be more, which will lead to the inadequate brightness of passive film; and the low iron content will lead to the low iron content in the galvanized coating, which will reduce the corrosion resistance of automobile panels, and will lead to olive color on the surface of automobile panels.

4、光亮剂:现在使用较多的光亮剂由ZF-100A和ZF-100B混合组成,前者浓度太高会增强镀层的脆性,而太低会造成低电流区的镀层较为稀疏,出现钝化不均现象。

4. Brightener: The brightener used now is composed of ZF-100A and ZF-100B. The former concentration is too high to enhance the brittleness of the coating, while too low to cause the coating in the low current zone to be sparse, resulting in non-uniform passivation.

5、温度:电镀过程中温度太高会导致溶液分散能力下降,镀层中铁含量升高,钝化不均匀;而反应温度过低时,高电流密度区会容易烧焦,镀层脆性较大且沉积速度较慢。

5. Temperature: High temperature in the process of electroplating will lead to the decrease of Solution Dispersion ability, the increase of iron content in the coating, and the non-uniform passivation; and when the reaction temperature is too low, the high current density zone will easily burn, the brittleness of the coating is greater and the deposition rate is slower.

6、阴极移动速度:电镀过程中必须保证阴极处于移动状态,如果移动速度太快,电镀过程中高电流密度区镀层会较粗糙;而移动速度太慢又可能产生气流,造成了材料镀层的不均。

6. Cathode moving speed: In the process of electroplating, the cathode must be kept in a moving state. If the moving speed is too fast, the coating in the high current density area will be rough; and if the moving speed is too slow, airflow may occur, resulting in the uneven coating of materials.

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Thank you for your busy watching and reading. For more wonderful content, please click on our official website: http://www.jnxjm.com or the keyword of the search website Jinan galvanized pipe to find us.



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