亚洲精品国产AV天美传媒,人妻少妇精品一区二区三区,丰满的少妇中文HD高清,亚洲中文久久精品无码照片

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(hào):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.
国产内射老熟女aaaa∵| 尤物av无码色av无码| 国产精品永久免费视频| 本道久久综合无码中文字幕| 精品国产av 无码一区二区三区| 国产精品兄妹在线观看麻豆| 日韩精品真人荷官无码| 亚洲国产天堂久久综合| 国产午夜A理论毛片| 女人张开腿让男人桶个爽| 无人区码一码二码三码区别新月| 最新亚洲人成无码网WWW电影| 国产精品992TV在线观看| 精品久久久久国产免费| 精品无码一区二区三区爱欲九九| 大战刚结婚的少妇| 国产v亚洲v天堂无码久久久| 亚洲A在线观看无码| 中国成熟妇女毛茸茸| 成人午夜视频精品一区| 亚洲国产另类精品| 99久无码中文字幕一本久道| 色欲人妻综合aaaaaaaa网| 一女三黑人玩4P惨叫| 久久狠狠中文字幕2017| 日本一区二区三区不卡免费| 中文字幕日本最新乱码视频| 天天摸天天做天天爽水多| 9 9久热re在线精品视频| 精品无码久久久久久久久水蜜桃| 少妇高潮毛片免费看| 国产AV丝袜一区二区三区| 国产波霸爆乳一区二区| 色欲色欲天天天WWW亚洲伊| 亚洲AV无码国产蜜桃麻豆| 久久不见久久见中文字幕免费| 国产午夜精品理论片小YO奈| 欧美牲交a欧美在线| 青草青草久热精品视频在线观看| 日本免费最新高清不卡视频| 亚洲人成人网站在线观看|