Today, the application of iron fence is very common, from small families, courtyards, to roads, railways, riverbanks and borders, you can see it everywhere. That iron fence how to buy it? What is qualified and what is defective? There's a lot of stress in it. If you don't pay attention, you may lose millions.

铁艺护栏网的选购原则：

Selection principle of Tieyi fence:

1、钢材本身的质量。钢管的用料规格尤其是厚度，是构成护栏的基本要素，质量一定要达到要求。它的硬度值也有要求，一般为159DPN。

1. The quality of the steel itself. The material specification of steel pipe, especially the thickness, is the basic element of guardrail, and the quality must meet the requirements. Its hardness value is also required, generally 159dpn.

2、钢材的镀锌层。这是决定护栏网使用寿命的一个至关重要的因素，镀锌层越厚，耐腐蚀性就越好，使用寿命也就越长。正常情况下，锌钢镀锌管的管材表面含锌量要达到60-80mm/㎡，锌纯度98.5%才算是合格。

2. Zinc coating on steel. This is a crucial factor to determine the service life of the fence. The thicker the galvanized layer, the better the corrosion resistance and the longer the service life. Under normal conditions, the zinc content on the surface of galvanized steel pipe should reach 60-80mm / m2, and the purity of zinc is 98.5%.

3、铁艺护栏网的外部处理。铁艺护栏网的一道生产工序，也就是表面喷塑处理，把镀锌管再次深加工。锌钢护栏工艺流程：机械加工→化学处理（去油→去灰→纳 米陶化→钝化）→静电喷涂→固化（220°高温仿搪瓷固化）经过多道工艺处理后，可达到30年不生锈。

3. External treatment of iron fence. Tieyi fence of a production process, that is, surface spray treatment, the galvanized pipe again deep processing. The technological process of zinc steel guardrail: machining → chemical treatment (degreasing → ash removing → nano ceramic → passivation) → electrostatic spraying → solidification (220 ℃) ° After multi process treatment, it can achieve 30 years of no rust.

如果用肉眼观察的话，表面要光滑平整，迎着光看过去没有凹凸不平的感觉，颜色要晶莹剔透。如果是磨砂喷涂的话，手摸上去跟摸在1000目的砂纸上的感觉很形似，不反光，给人一种厚重的感觉。

If you use the naked eye to observe, the surface should be smooth and flat, and there should be no uneven feeling when you look at the light, and the color should be crystal clear. If it is frosted spray, the feeling of hand touch is very similar to that of touch on 1000 mesh sandpaper, it does not reflect light, giving people a heavy feeling.