Reasons for and Prevention of Rust on Manholes, What causes the rust on manholes to appear? How should we address this situation? BelowShandong Manhole Cover ManufacturerIntroduce you to the knowledge of rust causes, please master it firmly.

1. There is chloride ion presence in the usage environment of manhole covers: chloride ions are widely found, such as in salt, sweat, seawater, etc. In an environment with chloride ions, corrosion occurs rapidly, even surpassing that of ordinary low-carbon steel. Therefore, specific requirements are placed on the usage environment of manhole covers, and they need to be frequently wiped clean to remove dust and maintain a dry, clean state.

2.未经固溶处理: Alloy elements have not been dissolved into the matrix, resulting in a low alloy content in the matrix and poor corrosion resistance. Therefore, attention should be paid to protective measures in this aspect.

3. Natural intergranular corrosion of manhole covers: Materials without titanium and niobium tend to have an intergranular corrosion tendency. Adding titanium and niobium, along with stabilization treatment, can reduce intergranular corrosion. A high-alloy steel that can resist corrosion in air or chemical corrosive media.