国产IGAO视频网在线观看,国产成人久久精品激情,四虎精品免费永久免费视频,精品国产男人的天堂久久

常熟國強(qiáng)和茂管材有限公司

Sinupower Heat Transfer Tubes Changshu Ltd.
CN EN

400-100-7068

+ 微信號:WEIXINHAOMA

Your location : Home > News > Industry Dynamics

Recommended Products

National Service Hotline

400-100-7068

Precision tubes surface treatment process

Source:en      Release date: 2022-05-17
Information summary:The purpose of precision tube pickling treatment is to remove the oxide skin on the surface of precision tube after high temperature welding, heat treatment or hot processing. It can also achieve the purpose of eliminating red rust corroded steel or iron or steel particle contamination. However, it is necessary to pay attention to cleaning the acid solution on the surface of the precision pipe in
Surface treatment process of precision tube:
  1.
  Before passivation and pickling treatment, the surface of precision tube must be degreasing and degreasing, and further components must be welded after degreasing treatment to avoid Pick up carbon at high temperatures.
  2.
  The passivation process of precision tubes and tubes can only deal with precision steel tubes and stainless irons with precise surfaces. The primary purpose of passivation of precision tubes is to avoid oxidation and corrosion of the surface of precision tubes.
 3.
  The purpose of precision tube pickling is to remove the oxide skin on the surface of the precision tube after high temperature welding, heat treatment or thermal processing. It can also achieve the purpose of eliminating red rust corroded steel or iron or steel particle contamination. However, it is necessary to pay attention to cleaning the acid solution on the surface of the precision pipe in time after pickling, otherwise the surface of the steel pipe will soon begin to rust and corrode. This leads to a decrease in the corrosion resistance of the underlying steel pipe surface.
俺来也俺去啦久久综合网| 国产品无码一区二区三区在线| 朝鲜女人大白屁股ass孕交| 无码人妻av一二区二区三区| 又粗又猛又黄又爽无遮挡| 久久精品国产亚洲av蜜臀| 欧美极品jizzhd欧美| 精品国产男人的天堂久久| 好大好硬好深好爽想要av| 国产精品99久久免费| 色婷婷六月亚洲婷婷丁香| 精品无人区麻豆乱码1区2区| av片在线观看永久免费| 国产精品毛片在线完整版| 人人妻人人澡人人爽人人精品浪潮| 日日噜噜夜夜狠狠久久丁香五月 | 无码区a∨视频体验区30秒| 男男h黄漫画啪啪无遮挡| 国产精品日本一区二区不卡视频| 精品不卡一区二区| 久久久综合九色合综国产精品| 欧美 日韩 国产 亚洲 色| 久久亚洲国产成人精品无码区| 免费久久人人爽人人爽av| 亚洲av无码久久精品蜜桃| 国产精品自产拍在线观看| 99久久婷婷国产综合精品青草免费| 国产精品国产精品偷麻豆| 国产无遮挡又黄又爽不要vip网站 精品一区二区三区波多野结衣 | 国外b2b网站毛片| 无码孕妇孕交在线观看| 又粗又猛又黄又爽无遮挡| 国产无遮挡又黄又爽在线观看| 久久精品国产亚洲av电影| 夜夜爽8888免费视频| 亚洲男同gay片| 99久久免费精品国产72精品九九 | 国产乱人伦av在线麻豆a| 日韩精品无码免费专区网站| 国产精品美女久久久网av| 久久99热只有频精品8|