精品亚洲国产成人av,青青青在线播放视频国产,亚洲 自拍 另类小说综合图区,成人一区二区免费视频,国产网友自拍在线视频,国产女人的高潮大叫毛片,欧美人与动牲交aⅴ,免费无码一区无码东京热

          常熟國強和茂管材有限公司

          Sinupower Heat Transfer Tubes Changshu Ltd.
          CN EN
          + 微信號:WEIXINHAOMA

          Your location : Home > News > Industry Dynamics

          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.
          主站蜘蛛池模板: 免费黄色在线| 狠狠干夜夜| 波多野结衣中文字幕一区二区三区 | 色www视频永久免费| 精久久| 欧美h网站| 国产精品手机在线| av狠狠| 精品国产一区二区三区久久| 四虎毛片| 小妹色播| 国产乱子伦精品无码码专区| 欧美视频专区一二在线观看| 玖玖视频网| 国产性夜夜春夜夜爽1a片| 国产 精品 丝袜| eeuss一区二区三区| av日韩在线一区二区三区| 国产成人午夜精品福利视频| 亚洲综合第一页| 国产xxxx做受性欧美88| 狠狠色丁香婷婷综合尤物| 亚洲精品国产自在现线最新| 久草热在线视频| 欧美激情精品久久久久久免费| 久久亚洲国产成人影院| 丁香婷婷无码不卡在线| 麻豆精品国产传媒av| 内射干少妇亚洲69XXX| 国产色情又大又粗又黄的电影| 欧美第三页| 日本欧美激情| 国产成人一区二区三区别| 国产午夜福利精品久久2021| 18xxxx日本| 美乳丰满人妻无码视频| 欧美成ee人免费视频| 天天爽夜夜爽| 日日射视频| 亚洲性爱视频网站| 国产高清乱理伦片|