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    厂家对冷拔无缝钢管怎么防止生锈?

    2018-12-21 10:20:31 无锡盛发地坪科技有限公司 阅读

    冷拔钢管在一定的条件下也会生锈的。但其抗腐蚀能力的大小是随其钢质本身化学组成、加互状态、使用条件及环境介质类型而改变的。冷拔无缝钢管是靠其表面形成的一层极薄而坚固细密的稳定的富铬氧化膜(防护膜),防止氧原子的继续渗入、继续氧化,而获得抗锈蚀的能力。一旦有某种原因,这种薄膜遭到了不断地破坏,空气或液体中氧原子就会不断渗入或金属中铁原子不断地析离出来,形成疏松的氧化铁,金属表面也就受到不断地锈蚀。这种表面膜受到破坏的形式很多,日常生活中多见的有如下几种:

    Cold-drawn steel pipe will also rust under certain conditions. However, the corrosion resistance of the steel varies with its chemical composition, additive state, service conditions and the type of environmental medium. Cold-drawn seamless steel pipe is formed by a thin, solid, compact and stable chromium-rich oxide film (protective film) on its surface, which prevents oxygen atoms from penetrating into and oxidizing continuously, and obtains the ability to resist corrosion. Once for some reason, the film is constantly destroyed, oxygen atoms in air or liquid will continuously infiltrate or iron atoms in metal will continuously separate out, forming loose iron oxide, and metal surface will be constantly corroded. There are many forms of destruction of the surface film. 

    1、冷拔无缝钢管表面存积着含有其他金属元素的粉尘或异类金属颗粒的附着物,在潮湿的空气中,附着物与不锈钢间的冷凝水,将二者连成一个微电池,引发了电化学反应,保护膜受到破坏,称之谓电化学腐蚀。

    1. The surface of cold-drawn seamless steel pipe is deposited with dust containing other metal elements or adhesives of different metal particles. In moist air, the adhesives and condensate water between stainless steel and stainless steel connect them into a micro-battery, which leads to electrochemical reaction, and the protective film is destroyed. It is called electrochemical corrosion.

    2、冷拔无缝钢管表面粘附有机物汁液(如瓜菜、面汤、痰等),在有水氧情况下,构成有机酸,长时间则有机酸对金属表面的腐蚀。

    2. The surface of cold-drawn seamless steel pipe is adhered with organic juice (such as melon, vegetable, noodle soup, phlegm, etc.). Under the condition of water and oxygen, organic acid is formed, and for a long time, organic acid corrodes the metal surface.

    3、冷拔无缝钢管表面粘附含有酸、碱、盐类物质(如装修墙壁的碱水、石灰水喷溅),引起局部腐蚀。

    3. The adherence of cold-drawn seamless steel pipe surface to acid, alkali and salt substances (such as alkali water and lime water splashing on decoration walls) causes local corrosion.

    4、在有污染的空气中(如含有大量硫化物、氧化碳、氧化氮的大气),遇冷凝水,形成硫酸、硝酸、醋酸液点,引起化学腐蚀。

    4. In polluted air (such as atmosphere containing large amounts of sulfide, carbon dioxide and nitric oxide), sulfuric acid, nitric acid and acetic acid are formed in the presence of condensate, which leads to chemical corrosion.

    以上情况均可造成冷拔无缝钢管表面防护膜的破坏引发锈蚀。所以,为确保金属表面永久光亮,不被锈蚀,我们建议:

    All of the above can cause the surface protective film damage of cold-drawn seamless steel tube and lead to corrosion. Therefore, in order to ensure that the metal surface is permanently bright and not corroded, we recommend:

    1、必须经常对装饰冷拔无缝钢管表面进行清洁擦洗,去除附着物,消除引发修饰的外界因素。

    1. The surface of decorative cold-drawn seamless steel tubes must be cleaned and scrubbed regularly to remove the attachments and eliminate the external factors causing the modification.

    2、海滨地区要使用316材质冷拔无缝钢管,316材质能抵抗海水腐蚀。

    2. Seamless cold-drawn 316 steel pipes should be used in coastal areas. 316 steel pipes can resist seawater corrosion.

    3、市场上有些冷拔无缝钢管化学成分不能符合相应国家标准,达不到304材质要求。因此也会引起生锈,这就需要用户认真选择有信誉厂家的产品。

    3. The chemical composition of some cold-drawn seamless steel tubes in the market can not meet the corresponding national standards, and can not meet the material requirements of 304. Therefore, it will also cause rust, which requires users to carefully choose products from reputable manufacturers.



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