Sharing of anti-corrosion protection measures for hydrochloric acid storage tanks

Thread Content

To address the issue of corrosion and leakage in hydrochloric acid storage tanks, there are generally two common repair methods: 1. Traditional welding repairs； However, traditional patch welding also has significant drawbacks. Firstly, it fails to resolve leakage issues and is quite dangerous. Using a replacement medium followed by patch welding involves a long duration of work and high labor intensity for workers, resulting in substantial losses due to downtime and production interruptions. Use an anti-corrosion coating ； Among them, Sore CMI heavy-duty anti-corrosion materials are leaders in the field of corrosion protection; they can provide rapid, simple, and effective protection for equipment. The materials’ comprehensive properties, including their resistance to chemical corrosion and their bonding capabilities, help to avoid the negative effects associated with traditional patch welding repairs. Regarding the protection of hydrochloric acid storage tanks, the entire process is very simple; it only requires a few steps to be completed. The specific repair steps are as follows: 1. First, use a high-pressure sprayer equipped with a chemical cleaner to chemically clean the inner surface of the tank. 2. Sandblast the surface of the storage tank to remove any existing dirt on the epoxy lining. 3. Wash the surface of the storage tank again and check for any residues of hydrocarbons and chlorides. 4. Then, the storage tank is sandblasted again to prepare it for coating. 5. Next, proceed with the two-layer coating process ； First, apply a gray primer, followed by a red topcoat, to prevent discoloration caused by hydrochloric acid. 6. Heat-cure the Sorey CMI coating at 177°C for 8 hours to enhance the cross-linking of the polymer. The image above shows the storage tank that a company plans to use for storing hydrochloric acid (as shown in the image). First, sandblasting is required to remove the existing epoxy lining as well as dust and grease from the surface. Afterwards, Sorex Industrial carries out a chemical cleaning of the equipment to prepare it for coating. Finally (in the figure below), two layers of CMI material are applied to the surface of the storage tank to prevent corrosion by hydrochloric acid. However, during regular maintenance, it is essential to conduct periodic inspections and maintain complete records of the storage tanks to facilitate future repairs and checks.