(1) The formed coating shall have good mechanical properties;

（2）涂层形成后对杂质的渗透抵抗性能要好；

(2) After the coating is formed, the penetration resistance to impurities is better;

（3）防腐涂料的耐腐蚀性极强且极为稳定，对于钢材表面的保护作用明显；

(3) The anti-corrosion coating has strong and stable corrosion resistance, and has obvious protective effect on the steel surface;

（4）涂料的附着力要强，能轻易的附着于钢材表面，涂层的寿命较高；

(4) The coating has strong adhesion, can be easily attached to the steel surface, and the service life of the coating is high;

（5）涂料要易于施工，无污染且成本不高。根据以上标准，一般钢结构的防腐工程中选用环氧富锌底漆（不锈钢基材除外）、环氧云铁中层漆、氯化橡胶面漆，这些漆的特性基本符合上述标准，且物美价廉，便于施工，是桥梁工程中Z常用于钢结构防腐的配套涂层。

(5) The coating shall be easy to apply, environmentally friendly, pollution-free and low cost. According to the above standards, epoxy zinc rich primer shall be selected in the anti-corrosion works of general steel structures (except for stainless steel substrate), epoxy micaceous iron intermediate paint and chlorinated rubber finish paint. The characteristics of these paints basically meet the above standards, are of high quality and low price, and are convenient for construction. They are the supporting coatings often used for anti-corrosion of steel structures in bridge engineering.

钢结构的涂层也有区分，一般在桥梁工程中将钢结构的涂层分为底涂、中涂以及面涂。底层涂料主要是针对钢铁表面的粘附性要求和防腐蚀保护，底漆的漆膜厚度一般较低，但过钢表面抛丸后的粗糙度峰值是基本要求，另外要满足钢表面的润湿性，能深入到焊缝、锈痕的较深部位；中涂是对底漆和面漆的附着力；中涂是对底漆和面漆的附着力；

The coating of steel structure is also distinguished. Generally, the coating of steel structure is divided into primer, intermediate coating and surface coating in bridge engineering. The primer is mainly aimed at the adhesion requirements and anti-corrosion protection of the steel surface. The paint film thickness of the primer is generally low, but the peak roughness after shot blasting on the steel surface is the basic requirement. In addition, it should meet the wettability of the steel surface and go deep into the deeper parts of the weld and rust marks; Intermediate coat is the adhesion to primer and finish coat; Intermediate coat is the adhesion to primer and finish coat;

面漆的使用有着美化钢结构表面的作用，同时面漆还能将紫外线遮挡在涂层之外，减小紫外线对涂层的老化影响，有的面漆还具有耐化学品腐蚀的特性。一般选用长油醇酸磁漆、环氧树脂漆、芳烃型聚氨酯漆、氟树脂漆、氯化橡胶漆、氯化橡胶漆等

The use of finish paint can beautify the surface of steel structure. At the same time, the finish paint can block the ultraviolet ray outside the coating to reduce the aging impact of ultraviolet ray on the coating. Some finish paints also have the characteristics of chemical corrosion resistance. Long oil alkyd enamel, epoxy resin paint, aromatic polyurethane paint, fluororesin paint, chlorinated rubber paint, chlorinated rubber paint, etc. are generally selected

在钢结构防腐工程中，Z常用的涂装方法是喷涂、辊涂和手工刷涂。喷涂作业时，由于稀释剂的添加量和试件形状的影响，一般会产生严重的流挂现象。为了避免流挂的产生，一般对面积不大的基体采用刷涂的方法，以减少涂料的消耗。涂装过程中还有一些隐蔽工程，如防护施工，需要严格的质量控制系统来测量质量结果，因此需要配备准确的检测仪器。

In the anti-corrosion engineering of steel structure, Z common coating methods are spraying, roller coating and manual brushing. During spraying operation, serious sagging will generally occur due to the influence of the amount of diluent and the shape of the specimen. In order to avoid sagging, brush coating is generally adopted for the substrate with small area to reduce the consumption of coating. There are also some concealed works in the coating process, such as protection construction, which need a strict quality control system to measure the quality results, so accurate testing instruments need to be equipped.