亚洲最黄视频-亚洲最大在线-亚洲最大网址-亚洲最大色网-亚洲最大色视频-亚洲最大情网站在线观看

Greenhouse tube

Greenhouse tube

DESCRIPTION

Greenhouse building structure with tube 1, hot-dip galvanized steel pipe structure: hot dip galvanized pipe is the molten metal and the reaction of the iron matrix alloy layer, so that both the substr


DETAILS

Greenhouse building structure with tube
1, hot-dip galvanized steel pipe structure: hot dip galvanized pipe is the molten metal and the reaction of the iron matrix alloy layer, so that both the substrate and coating combination. Hot galvanized pipe is the first pickling pipe, in order to remove the iron oxide on the surface of the steel pipe, after pickling, ammonium chloride or zinc chloride solution or aqueous solution of ammonium chloride and zinc chloride tank cleaning, and then sent Into hot dipping tank. Hot dip galvanized coating with uniform, strong adhesion, long life and other advantages. Hot galvanized steel substrate and the molten bath complex physical and chemical reactions, the formation of corrosion-resistant zinc-iron alloy layer closely. Alloy layer and pure zinc layer, steel substrate integration. Therefore, its strong corrosion resistance.
2, galvanized pipe structure: galvanized pipe to produce the production of hot-dip galvanized pipe made adjustments. In order to remove the iron oxide on the surface of the steel strip, the steel strip is first pickled, cleaned with an aqueous solution of ammonium chloride or zinc chloride or a mixed solution of ammonium chloride and zinc chloride, and then cleaned Into hot dipping tank. Then air-dried, and then made of pipe. With a coating uniform, bright, very little galvanized, than the cost of producing hot-dip galvanized pipe. Its corrosion resistance slightly worse than the hot-dip galvanized pipe!
3, hot-dip galvanized steel pipe and galvanized pipe difference: hot-dip galvanized pipe:
1) color hot galvanized pipe a little whitish, weight: 6.5 kilograms long 6 meters (corrosion resistance, long life, the price is slightly higher);
2) Galvanized pipe snow white, but not shiny, non-reflective, many snowflake-like surface, two ports of zinc tumor (condensed zinc)
Galvanized pipe:
1) Color Galvanized pipe is a little blue, 2) Weight: 5.5 kg in 6 meters long (corrosion resistance is slightly worse than the service life of hot-dip galvanized steel pipe short life, low price economy).
2) Galvanized tube White too bright and reflective, very few snow-like, two-port clean zinc-free tumor.

RELATED PRODUCTS

日韩高清无码内射 | 日本在线观看视频 | 日本免费三级片网站 | 日本在线不卡一区二区三区 | 国产午夜视频在线观看 | 精品国产99久久久久久宅男i | 中文子幕精品无码一区二区 | 日韩无码少妇出轨 | 国产午夜在线视频 | 亚洲视频免费在线观看 | 裸体成人A片一区二区裸体按摩 | 亚洲无码在线第五页 | 国产又粗又猛又爽又黄的 | 偷拍一区二区三区 | 91在线无码精品秘 入口动漫板 | 中文字幕无码人妻视频 | 又粗又硬又爽18级A片 | 午夜影视免费区欧美区 | 国产成人在线免费观看视频 | 99精品丰满人妻无码一区二区 | 国产成人片在线播放 | 波多野结衣AV久久在线 | 高清无码免费观看 | 欧美综合图亚洲综合另类 | yy9765国产无码| 2016日日夜夜操 | 少妇厨房愉情理伦BD在线观 | 免费无码婬片AAAA片直播 | 欧美三级欧美成人高清 | 亚洲图片小说视频 | 海角社区网站麻豆入口 | 日本无码A片人妻久尤物 | 国产精品成人无码一区二区三区 | 不卡av中文字幕在线观看 | 欧美一区二区性爱视频 | 欧美性一乱一交一视一频 | 亚洲日韩一区久久99第一页 | 成人无码一区二区三区 | 国产一级 片内射视频播放蘑菇 | 無碼破解壊版无码网站 | xxx中文字幕在线 |