不锈钢油漆的应用必要性

不锈钢不容易生锈与不锈钢的成分有很大的关系。不锈钢的成分中除了铁外，还有铬、镍、铝、硅等。一般的不锈钢含铬量一般不低于12%，高的甚至达到18%。钢中加入铬等元素后，就能改变钢的性能，如例钢的分子结构更均匀，在钢的表面更易生成一层致密的氧化物保护膜等，从而大大提高不锈钢耐腐蚀的能力。

Stainless steel is not easy to rust and stainless steel components have a great relationship. In stainless steel ingredient besides iron, chromium, nickel, aluminum, and silicon. General of the chromium containing stainless steel is generally not less than 12%, higher even reached 18%. Steel added elements such as chromium, can change the performance of the steel, such as the molecular structure of steel more uniform on the surface of the steel is more easily to form a layer of dense oxide film, which greatly improve the ability of anti corrosion of stainless steel.

所以不锈钢能抵抗火、水、酸、碱和各种溶液对它的腐蚀，不生锈。科学家发现，钢的内部结构越均匀，各种组成成分就联系得越紧密，腐蚀物入侵就越困难，再加上表面又附着一层氧化物保护膜，就像给钢铁穿上盔甲一样，自然就不容易生锈了。但是不锈钢也会生锈。

So the corrosion resistance of stainless steel can fire, water, acid, alkali and solution to it, and do not rust. The scientists found that the internal structure of the steel is more uniform, the various components of the more closely linked to the corrosion of the more difficult the invasion, also attached to the surface with a layer of oxide film, like to wear armor steel, not natural the rust easily. But stainless steel will rust.

不锈钢为什么也生锈?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。

Why are stainless steel rust? When the stainless steel tube surface appear brown rust (point) of the time, people are surprised: "the stainless steel does not rust, rust is not stainless steel, steel may be a problem". In fact, this is a one-sided view of the error of the lack of understanding of stainless steel. Stainless steel under certain conditions will rust.

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。

Stainless steel has the ability to resist oxidation of the atmosphere - that is, not rust, but also with 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.

如304钢管，在干燥清洁的大气中，有绝对优良的抗锈蚀能力，但将它移到海滨地区，在含有大量盐份的海雾中，很快就会生锈了;而316钢管则表现良好。因此，不是任何一种不锈钢，在任何环境下都能耐腐蚀,不生锈的。

Such as the 304 steel pipe, in a clean dry air, is absolutely good corrosion resistance, but it will be moved to the beach area, with large amounts of sea salt fog, they will soon rust; and the good performance of 316 steel pipe. Therefore, not any kind of stainless steel, can in any environment corrosion, no rust.

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 rich 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 it, the loose formation of iron oxide, the metal surface will be constantly corrosion. Many of these surface damage form, more common in daily life are as follows:

1.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。

1 stainless steel surface accumulated with dust or other particles containing other metals attachments, in the humid air, condensation water and attachment of stainless steel, the two together into a micro battery, causing the electrochemical reaction, the film has been destroyed, called the electro chemical corrosion.

2.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。

2 stainless steel surface adhesion of organic juice (such as vegetables, soup, sputum, etc.) in the case of water oxygen, organic acid, organic acid, long time on the surface of metal corrosion.

3.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。

3 stainless steel surface adhesion containing acid, alkali, salt material (such as wall decoration of salt water, lime water splash), caused by the localized 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 polluting the air (such as containing a large amount of sulfide, carbon dioxide, nitrogen oxides in the atmosphere), the case of condensed water to form sulfuric acid, nitric acid, acetic acid, caused by chemical corrosion.