Causes of corrosion of cement pipes and anticorrosive methods:
In people's day, cement pipes are used in many places. Because of its existence, people's lives will be more convenient. It is used in the construction of cities and can be used in sewage pipes to discharge waste liquid in the day. It also has a great effect on flood prevention and is an indispensable device in people's day.
Under normal circumstances, the cement pipe laid in the ground for a long time is outstanding. However, when there is a corrosive medium inside or outside, corrosion will occur and cause damage. There are various reasons for the corrosion of cement pipes , including daily sewage, industrial wastewater, and corrosive media in the soil. In recent years, due to the addition of protein in daily sewage, the general use of synthetic detergents, the increase of water temperature, and the complication of industrial wastewater, whether it is a split-type cement pipe , a sewage pipe or a combined cement pipe, corrosion Is a serious problem.
The acid substance and calcium hydroxide in the cement will have a neutralization reaction, and the product will have a loose volume and swell, and it will be easily hydrolyzed and powdered when it encounters water. As a result, the concrete or plaster layer is gradually corroded and collapsed, so the cement is not subject to acid corrosion. Where acidic materials or containers are touched, acid-resistant mortar and acid-resistant concrete should be used. Slag cement, pozzolan cement, and fly ash cement all have good acid resistance. These three types of cement should be preferentially used to make acid-resistant mortar and concrete. Projects that strictly require resistance to acid corrosion are not allowed to use general cement.