The corrosion of hot-dip galvanized cable tray in Shandong exists. Under certain environmental conditions, hot-dip galvanized cable tray will also cause corrosion. Why is it corroded? What caused it?

电缆桥架热镀锌桥架如高压减压阀中的阀瓣(头)和阀座、离心泵的叶轮、风机中的叶片等，由镀锌桥架磨损和腐蚀联合作用而产生的资料破坏过程叫磨损腐蚀。磨损腐蚀可发生在高速流动的流体管道及载有悬浮摩擦颗粒流体的泵、管道等处。

Shandong cable tray hot-dip galvanized cable tray, such as valve disc (head) and valve seat in high-pressure pressure reducing valve, impeller of centrifugal pump, blade in fan, etc. the data destruction process caused by the combined action of wear and corrosion of galvanized cable tray is called wear and corrosion. Wear corrosion can occur in high-speed fluid pipelines and pumps and pipelines containing suspended friction particles.

有的过流部件。这些部位腐蚀介质的相对流动速度很高，使钝化型耐蚀金属资料外表的钝化膜，因受到过分的机械冲刷作用而不易恢复，腐蚀率会明显加剧，如果腐蚀介质中存在着固相颗粒，会大大加剧磨损腐蚀.称为腐蚀疲劳。疲劳破坏的应力值低于屈服点，腐蚀疲劳是腐蚀介质与循环应力的联合作用下产生的这种由于腐蚀介质而引起的抗腐蚀疲劳性能的降低。

Some overcurrent components. The corrosion rate of the passivation medium is relatively high, and the corrosion resistance of the passivation medium will be greatly increased due to the excessive erosion of the solid medium It is called corrosion fatigue. The stress value of fatigue failure is lower than the yield point. Corrosion fatigue is caused by the combined action of corrosive medium and cyclic stress, which reduces the anti-corrosion fatigue performance caused by corrosive medium.

一定的临界循环应力值(疲劳或称疲劳寿命)以上时，才会发生疲劳破坏。而腐蚀疲劳却可能在很低的应力条件下就发生破断，因而它很危险的。都会使腐蚀疲劳强度下降。热镀锌桥架厂家资料外表的损伤或较低的粗糙度所产生的应力集中，影响资料腐蚀疲劳的因素主要有应力交变速度、介质温度、介质成分、资料尺寸、加工和热处理等。

Fatigue failure occurs only when a certain critical cyclic stress value (fatigue or fatigue life) is above. However, corrosion fatigue may break under very low stress conditions, so it is very dangerous. Will reduce the corrosion fatigue strength. The stress concentration caused by the damage or low roughness of the data surface of the hot-dip galvanized bridge manufacturer. The factors affecting the data corrosion fatigue mainly include stress alternating speed, medium temperature, medium composition, data size, processing and heat treatment.

增加载荷循环速度、降低介质的PH值或升高介质的温度。会使疲劳下降，从而也会降低疲劳强度.沿着资料的晶粒间界受到腐蚀，晶间腐蚀是金属资料在特定的腐蚀介质中。使晶粒之间丧失结合力的一种局部腐蚀破坏现象。受这种腐蚀的设备或零件，有时从外表看仍是完好光亮，但由于晶

Increase the load cycle speed, reduce the pH value of the medium or increase the temperature of the medium. It will reduce fatigue and thus reduce fatigue strength Intergranular corrosion refers to the corrosion of metal materials in a specific corrosion medium. A local corrosion failure phenomenon that causes the loss of bonding force between grains. Sometimes the equipment or parts subject to this corrosion are still intact and bright from the appearance, but it is caused by Yu Jing

几乎丧失了强度，粒之间的结合力被破坏。严重者会失去金属声音，轻轻敲击便成为粉末.据统计，石油、化工设备腐蚀失效事故中，晶间腐蚀约占4%9%主要发生在用轧材焊接的容器及热交换器上。

The strength is almost lost and the bonding force between particles is destroyed. In severe cases, the metal sound will be lost, and it will become powder when knocked gently According to statistics, intergranular corrosion accounts for about 4% and 9% of the corrosion failure accidents of petroleum and chemical equipment, mainly on vessels and heat exchangers welded with rolled materials.

一般认为，晶界合金元素的贫化是发生晶间腐蚀的主要原因。山东电缆桥架热镀锌桥架厂家通过提高资料的纯度，去除碳、氮、磷和硅等有害微量元素或加入少量稳定化元素(钛、铌)以控制晶界上析出的碳化物及采用适当的热处置制度和适当的加工工艺，可防止晶间腐蚀的发生.应以抗均匀腐蚀作为主要的耐蚀性能依据，均匀腐蚀是指在与环境接触的整个金属外表上几乎以相同速度进行的腐蚀。

It is generally believed that the dilution of alloying elements at grain boundaries is the main reason for intergranular corrosion. By improving the purity of data, removing harmful trace elements such as carbon, nitrogen, phosphorus and silicon, or adding a small amount of stabilizing elements (titanium and niobium) to control the carbide precipitated on the grain boundary, and adopting appropriate heat treatment system and appropriate processing technology, Shandong cable tray hot-dip galvanized cable tray manufacturers can prevent the occurrence of intergranular corrosion Uniform corrosion resistance should be taken as the main basis for corrosion resistance. Uniform corrosion refers to the corrosion carried out at almost the same speed on the whole metal surface in contact with the environment.