99热.COM中字无码在线播放|97色伦黄色网站女生喷液在线观看|丁香二月久久久99爱 免费专区|91美女a级毛片国产在线精品不卡|日韩精品视频网六月丁香婷婷激情|亚洲黄色伊人色屁屁在线观看|欧美视频亚洲国产欧美第二页|91a片视频天天操夜夜拍

400-0318-009
Online consulting
The news in detail

What method does caster galvanize have?

author:Zaoqiang County Dongrui Caster CO., LTD. source:m.clubbba.com Published time:2019-8-2 瀏覽:

As we all know, for caster galvanized we all know is actually in caster alloy surface plating a layer of zinc is mainly a beautiful, anti-rust effect of a kind of surface treatment technology. But for caster galvanized method is also there are many kinds of galvanized methods used in different places. The following universal wheel to introduce caster galvanized several methods.

1, cyanide galvanized

Due to the extremely toxic nature of cyanide (CN), the environmental protection has put forward strict restrictions on the use of cyanide in electrogalvanization of caster metal parts, and continuously promoted the development of electrogalvanization bath system for reducing cyanide and replacing cyanide caster metal parts. Low - cyanide (micro - cyanide) caster hardware parts of the plating solution. Using this technology caster hardware parts of electroplating product quality, especially color plating after passivation can be very good to maintain the color.

2, zincate galvanized

Zincate zinc plating process is evolved from cyanide zinc plating. At present, there are two major domestic factions:

(1) "DPE" series of wuhan material protection institute

(2) "DE" series of broadcasting institute

Both of these are alkaline additive zincate zinc plating; The PH value is 12.5~13. The lattice structure of the coating is columnar with good corrosion resistance.

Typical formula :NaOH--110~120g/l; ZnO - 11 ~ 12 g/l; 94-5 ~ 7 g/l. For the product code 94 is "DPE - Ⅱ" and the combination of ethanolamine.

Note: the product out of the groove - > wash - > after the light (nitric acid and hydrochloric acid) - > wash - > passivation - > washing - > washing - > hot dry - > drying - > aging treatment (oven within 80 ~ 90 oc).

3, chloride galvanized

Chloride zinc plating process in the caster part of the metal plating industry widely used in the proportion of up to 40%. After passivation (blue white) can be zinc instead of chromium (comparable to chromium plating), especially after the addition of water-soluble varnish, it is difficult for the layman to distinguish galvanized or chrome plating. This process is suitable for white passivation (blue white, silver white). When the customer has no special requirements, it is best to choose silver passivation (color and luster remain relatively stable).

Typical formula: KCl--180~220g/l; ZnCl - 65 ~ 75 g/l; H3BO3--25~30g/l(buffer); The PH value of 5 ~ 5.5; Ci-87 --15~20g/l(brightener).

4, sulfate galvanized

Sulfate zinc plating process is suitable for continuous plating (wire, strip, simple, large and coarse parts) with low cost.

Typical formula: ZnSO4--300~500g/l; H3BO3-25 ~ 30 g/l; PH value: 4.5 ~ 5.5; Sulfur zinc --15~20g/l(brightener).

In the previous:How to correctly select the bearing of caster?
The next article:Key technological points for determining the weight of industrial handcart casters
Zaoqiang County Dongrui Caster CO., LTD.

400-0318-009+86 318 7921919
dr@zqdrjl.comm.clubbba.com
No.21,District 12,Rubber City, Taocheng District,Hengshui City, Hebei Province,China
Home  |   About Us  |  Terms  |  Products  |  Marketing  |  News  |   SiteMap  |   RSS
Copyright © Zaoqiang County Dongrui Caster CO., LTD. All rights reserved  
Address: No.21,District 12,Rubber City, Taocheng District,Hengshui City, Hebei Province,China  
Tel:400-0318-009  +86 318 2109610  Fax:+86 318 7921919  
E-mail:dr@zqdrjl.com  casterdongrui@msn.com
清涧县| 三门峡市| 那坡县| 普洱| 容城县| 新泰市| 准格尔旗| 景洪市| 绿春县| 淳化县| 大丰市| 繁峙县| 双辽市| 昭通市| 宜阳县| 南川市| 汤原县| 澎湖县| 汶川县| 肥西县| 东源县| 兰州市| 京山县| 枣强县| 桐城市| 城市| 威海市| 班玛县| 平遥县| 买车| 通州区| 孙吴县| 闸北区| 安达市| 阳高县| 五河县| 确山县| 迁安市| 黄大仙区| 武邑县| 临漳县|