During the acid washing and passivation of stainless steel heat exchangers, how should the studs of carbon steel equipment be protected?
Thread Content
How to protect the studs of carbon steel equipment during the pickling and passivation process after the pressure test of stainless steel heat exchangers? What do people usually do?
During the pickling and passivation process of stainless steel heat exchangers, it is necessary to take care to protect the studs of carbon steel equipment from corrosion. Protection can be achieved through the following methods: 1. Cover the studs of carbon steel equipment with materials such as plastic bags and tape to prevent them from coming into direct contact with acidic liquids, thereby providing protection. 2. Isolate the studs of the carbon steel equipment from the stainless steel heat exchanger by installing them at intervals, ensuring a certain distance between the two to prevent corrosion of the studs in the carbon steel equipment. 3. Before carrying out the acid cleaning and passivation process, apply a protective coating on the surface of the studs in carbon steel equipment to form a protective layer that prevents corrosion. The above are some common protective measures; appropriate methods can be chosen based on specific circumstances to ensure that the studs of carbon steel equipment are not corroded during the pickling and passivation process. .
We apply pressure only after acid washing and passivation of the tube box
Thank you. We are currently using film coverage; we’re just looking to see if there are better methods for corrosion prevention