有无特殊腐蚀因素。
Is there any special corrosion factor.
强酸，强碱，溶剂油，盐雾等，必须从底漆开始加强防护。另外水上，潮湿环境腐蚀严重，也需要配套高性能的防腐底漆，例如环氧富锌底漆，无机富锌底漆等。
Strong acids, alkalis, solvent oils, salt mist, etc. must be protected from the primer. In addition, in water and humid environments where corrosion is severe, high-performance anti-corrosion primers such as epoxy zinc rich primers and inorganic zinc rich primers are also required.
3、钢结构设备使用的温度
3. Temperature used for steel structure equipment
大多数油漆只能在常温下使用，如需在高温环境下使用，必须选用耐高温防腐漆，例如无机富锌底漆，有机硅耐高温漆。
Most paints can only be used at room temperature. If they need to be used in high-temperature environments, high-temperature and anti-corrosion paints must be selected, such as inorganic zinc rich primer and organic silicon high-temperature resistant paint.
4、钢结构防腐所采用的面漆
4. Top paint used for anti-corrosion of steel structures
应该充分考虑到防腐漆与面漆的配套性，避免因为不配套而导致的涂装问题。例如醇酸防腐漆虽然涂装简便，但是其不能配套双组份的高性能防腐面漆使用，环氧富锌底漆也不能配套醇酸磁漆使用。
The compatibility between anti-corrosion paint and topcoat should be fully considered to avoid coating problems caused by non matching. For example, although alkyd anti-corrosion paint is easy to apply, it cannot be used with two component high-performance anti-corrosion topcoat, and epoxy zinc rich primer cannot be used with alkyd enamel.
5、钢结构所处的环境
5. The environment in which the steel structure is located
选防腐漆之前，应该充分考虑钢结构的使用环境的腐蚀因素，腐蚀轻微的，可以选用普通防腐漆即可，海边，化工厂，桥梁等腐蚀严重，或者重要钢结构，应该选用高性能防腐底漆。
Before selecting anti-corrosion paint, full consideration should be given to the corrosion factors of the working environment of the steel structure. For mild corrosion, ordinary anti-corrosion paint can be used. For severe corrosion in coastal areas, chemical plants, bridges, or important steel structures, high-performance anti-corrosion primer should be used.
表面涂刷专用防腐漆，仍是目前对钢结构工程防腐及网架防腐的主要手段。防腐漆按保护功能可分为底漆、中层漆和面漆，各层油漆均有其特性，各负其责，几层组合起来，形成复合涂层，提高防腐性能，延长使用寿命。
Applying special anti-corrosion paint on the surface is still the main means of anti-corrosion for steel structural engineering and grid structure. Anticorrosive paint can be divided into primer, intermediate paint, and topcoat according to its protective function. Each layer of paint has its own characteristics and responsibilities, and several layers are combined to form a composite coating, improving anti-corrosion performance and extending service life.