通风管道是为了空气流通、降低有害气体浓度的一种市政基础设施，广泛应用于餐饮酒店和工农业领域。在生活中我们处处都能看到通风管道，通风管道的重要性不言而喻。由于通风管道制作成本高，所以管道的保养处理问题日益受到重视，给通风管道制作和安装使用的过程加个“保险”——做好防腐保温工作就势在必行。
Ventilation duct is a municipal infrastructure for air circulation and reducing the concentration of harmful gases. It is widely used in restaurants, hotels, industry and agriculture. In life, we can see ventilation ducts everywhere, and the importance of ventilation ducts is self-evident. Due to the high manufacturing cost of ventilation pipe, the maintenance and treatment of pipe has been paid more and more attention. It is necessary to add "insurance" to the process of manufacturing, installation and use of ventilation pipe - do a good job in anti-corrosion and thermal insulation.
保温和保冷：
Insulation and cold insulation:
冬天（保热）：防止管道内空气的热损失；防止在输送废热蒸汽或高温气体时，热量散发到空间内而室内温度升高；防止人接触风道被烫伤；
Winter (heat preservation): prevent heat loss of air in the pipeline; Prevent the heat from being radiated into the space and the indoor temperature from rising when transporting waste heat steam or high-temperature gas; Prevent people from being scalded when contacting the air duct;
夏天（保冷）：可能出现因为输送气体的温度低于周围环境的温度，管道外壁会产生结露现象，这对集中空调系统的风道会加大冷量损失，同时凝结水滴会污染吊顶和墙面，所以要做好保冷隔热处理。
Summer (cold insulation): condensation may occur on the outer wall of the pipeline because the temperature of the transmitted gas is lower than that of the surrounding environment, which will increase the cooling loss of the air duct of the central air conditioning system, and condensate droplets will pollute the ceiling and wall, so cold insulation treatment shall be done well.
另外，当风道输送气体时，对风道进行除锈、刷防锈漆处理，对含尘气体可喷涂防损保护层。当周围环境空气湿度较大时，风道外壁需做防腐蚀、防锈处理。只有进行防腐保温（保冷），才能在之后的使用过程中减少腐蚀的现象。
In addition, when the air duct conveys gas, the air duct shall be derusted and painted with antirust paint, and the dust containing gas can be sprayed with anti-loss protective layer. When the ambient air humidity is high, the outer wall of the air duct needs anti-corrosion and anti rust treatment. Only by anti-corrosion and thermal insulation (cold insulation), can the phenomenon of corrosion be reduced in the later use process.
如：在雨季施工的过程之中要控制环境的温度，要使用温度计进行检测，如果空气施工超标，那么在这种四氟喷涂材料之中应该加入催干剂，以防泛白的情况发生，这些都是在施工过程中需要注意问题，对人员的操作的一个风干的过程之中，一定要严格控制温度以及湿度。
For example, during the construction in rainy season, the temperature of the environment should be controlled and the thermometer should be used for detection. If the air construction exceeds the standard, the drying agent should be added to the tetrafluoro spraying material to prevent whitening. These are problems that need to be paid attention to in the construction process, which is an air drying process for the operation of professionals, Temperature and humidity must be strictly controlled.
俗语常说“里三层外三层”，其实这并不是一句玩笑话！喷涂防腐工艺的确需要面漆6次，才能做到防腐！
As the saying goes, "three floors inside and three floors outside", in fact, this is not a joke! Spraying anti-corrosion process really needs 6 times of finish paint to achieve anti-corrosion!
综上所述，只有进行防腐保温保冷，才能在之后的使用过程中减少腐蚀的现象。
To sum up, corrosion can be reduced in the subsequent use only by anti-corrosion, thermal insulation and cold insulation.
而如何减少腐蚀？那就得选对技术选对产品！
And how to reduce corrosion? Then you have to choose the right technology and the right products!
特氟龙（聚四氟乙烯，简写PTFE）害、不粘性、高润滑（摩擦系数仅为0.04）、耐气候、耐腐蚀（能耐水和一切有机溶剂）、耐低温和耐高温，这些都只是特氟龙的一些基本使用性能。
Teflon (polytetrafluoroethylene, abbreviated as PTFE) is non-toxic, non viscous, high lubrication (friction coefficient is only 0.04), weather resistant, corrosion resistant (aqua regia and all organic solvents), low temperature resistant and high temperature resistant. These are just some basic service properties of Teflon.
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