zo0o与人xxx欧美另类,午夜福利一区二区三区,尤物网址在线观看,熟妇高潮一区二区三区

400-0318-009
Online consulting
The news in detail

What method does caster galvanize have?

author:Zaoqiang County Dongrui Caster CO., LTD. source:rui721.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:No
Zaoqiang County Dongrui Caster CO., LTD.

400-0318-009+86 318 7921919
dr@zqdrjl.comrui721.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
久久在精品线影院精品国产| 少妇性爱AV| 三级无码在线| 亚洲国产精品成人| 亚洲色偷偷av| 日本韩国一区二区三区| 手机免费观看一级片| 黑人一级黄色视频| 国产 中文 亚洲 日韩 欧美| 午夜亚洲影视| 学生妹AV| 又粗又硬又爽中文在线| 亚洲无码二区| 国产欧美久久久久一区| 91美女www| 国内精品洿| 不卡视频一区| 人人妻人人爱| 老色批该看的| 另类天堂网站专区| 亚洲国产另类久久久精品网站 | 精品人妻99一区二区三区| 91校花在线视频| 无码精品大奶人妻在线| 在线精品自偷自拍无码| 在线观看91av网站| 日本一区欧美| 亚洲欧洲无码专区AV| 伊人亚州| 干婊av.com| 久久久久亚洲AV综合仓井空| 私人黄在线观看| 日B日韩视频在线| 久久亚洲精品无码播放| 无码精品加勒比教师| 国产视频自拍乱视自| 国产精品午夜小视频观看 | 成人亲吻视频网站| 亚洲国产精品va在线播放| 欧美人体91视频| 亚洲啪啪综合网|