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不锈钢加工厂带大家了解为什么不锈钢也生锈

发布日期:2014-06-09 浏览次数:文章来源:未知 作者:北京不锈钢

导读:不锈钢 具有抵抗大气氧化的能力---即不锈性,同时也具有在含酸、碱、盐的介质中乃腐蚀的能力---即耐蚀性。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。当不锈钢管表面出现褐色锈斑(点)的时候,人们大感惊奇:

      不锈钢具有抵抗大气氧化的能力---即不锈性,同时也具有在含酸、碱、盐的介质中乃腐蚀的能力---即耐蚀性。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。当不锈钢管表面出现褐色锈斑(点)的时候,人们大感惊奇:认为 “不锈钢是不生锈的,生锈就不是不锈钢了,可能是钢质出现了问题”。 其实,这是对不锈钢缺乏了解的一种片面的错误看法。不锈钢在一定的 条件下也会生锈的。
       Stainless steel has the ability to resist oxidation of the atmosphere -- not rust, but also has the acid, alkali, salt corrosion of the medium is the ability, corrosion resistance. But its corrosion resistance is the size of steel with its own chemical composition, increase mutual status, conditions of use and environmental changes in the type of media. When the stainless steel tube surface appear brown rust (point) when, people are surprised: "the stainless steel does not rust, rust is stainless steel, steel may be a problem". In fact, this is a one-sided view of the error and lack of understanding of stainless steel. Stainless steel rusts in certain conditions.
     不锈钢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:
Stainless steel is a very thin layer formed on the surface and the stability of the fine solid chromium oxide film (protective film), to prevent the infiltration of oxygen atoms, to oxidation, and the ability to obtain anti-corrosion. Once there are some reasons, this film was constantly undermined, air or liquid oxygen atoms will continue to infiltrate or metal atoms of iron to keep out from them, the formation of porous iron oxide, metal surface will continue to rust. Many of these surface damage form, in their daily lives. There are several:
1.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。(北京不锈钢加工)
1 in air pollution (such as containing a large amount of sulfide, carbon dioxide, nitrogen oxides, atmospheric) case of condensation water to form sulfuric acid, nitric acid, acetic acid, liquid, caused by chemical corrosion.
2.不锈钢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
2 stainless steel surface deposit or dust particles heterogeneous metal containing other metal elements of attachment, in the moist air, fixtures and stainless steel between the condensate, and the two together into a micro battery, causing the electrochemical reaction, the protective film is damaged, called the electro chemical corrosion
3.不锈钢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。
3 stainless steel surface adhesion of organic juice (such as vegetables, soup, sputum), in the case of water oxygen, organic acid, long time organic acid on the surface of metal corrosion.
4.不锈钢表面粘附含有酸、碱、盐类物质(如装修墙壁的碱水、石 灰水喷溅),引起局部腐蚀。
4 stainless steel surface adhesion containing acid, alkali, salt material (such as wall decoration of alkaline water, lime water splash), caused by the localized corrosion.
文章来源:(http://www.scheufelenna.com

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