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
siwa导航| 国产精品福利影院一区| 美国xXx潮喷| 精品视频久久高潮| 又黄又爽又舒服视频| 美女操逼逼晓晓视频| 日本啪啪在线| 色欲成人精品一区二区| 中文字幕亚洲无码久艹| 91色欲欧美国产| 欧洲日本韩国一区二区三区| 九一精品亚洲综合| 综合图区亚洲一区| 1d94久久久| 一道精品一本日本三本| 一本色道久久888| 中文字幕九九视频在线观看操逼| 超碰在线CaoPorn 五月婷婷| 久久久久久久伊人| 国产成人亚洲综合色影视在线| 欧美三级伦理免费看| 国产精彩91视频| 国产精品无码久毛一斤久久久| 男女草逼视频网站大全| 日本二区三区久久久| 天天操夜夜操天天操| 国产免费无遮挡自拍| 五月丁香视频在线| 麻豆精品人妻在线视频| 足交91视频| 一区二区三区四区乱码免费| 国产福利片九区| 美日韩色av| 亚洲 日韩 制服 中文 国产| 欧美经典国产二区| 国产又大又粗又爽的视频| 91美女主播在线视频| 最新国产啪精品视频网站免| 在线播放成人不卡AV| 欧美精品一区二区三区,-百度| av福利ccc.|