精品电影一区,美乳大鸡巴网页,欧美中学一区欧美系列,最美人妻在线视频一区二区

400-0318-009
Online consulting
The news in detail

What method does caster galvanize have?

author:Zaoqiang County Dongrui Caster CO., LTD. source:koyoda.cn 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.comkoyoda.cn
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
国产中文不卡久久网| 激情另类在线| 不卡的免费AV| 欧美影院首页一区| 日本精品中文一区免费| 国产精品四五| 久久产区二区日韩| 国产一级欧美| 岛国中文字幕av伊人| 乱草一区二区国产| 97网友自拍| 激情约熟视频在线| 亚洲性爆视频| 国产精品美女下面视频| 久久久九久九久九九九| 午夜成人黄色小电影。| 大香蕉最新视频网址| 欧美日韩综合一本道视频| 激情亚洲91| 操高跟鞋大奶日本| 天天色天天爽天天日| 久久久久久久久久久久久高潮| 韩日不卡一区| 亚洲性猛交 88vv| 免费一二三AV| 伊人超碰在线不卡| 艹视频免费在线播放| 国产爆操91| 免费看色诱视频网站| 国产欧美熟女二区三区| 久久久精品老熟女视频| 抄逼逼视频| 岛国精品一区二区三区四区在线播放| 欧美老妇乱一区二区| 51在线视频观看| 亚洲国际欧美日韩国产成人影片| 欧美精品久久久一区二区三区| 国产区欧美区91| caoporn进入离开欧美| 成人免费不卡| 婷婷五月天av无码一区二区|