Acid circulation is the regulated flow of acidic solutions in an industrial environment to accomplish particular tasks, such as cleaning or metal polishing. Typically, closed-loop systems are used to circulate the acid, which goes through several procedures, such as purification, regeneration, and filtration. This closed-loop method ensures it is recycled rather than thrown away by preserving the acid’s chemical characteristics. Maintaining acid concentration and purity is essential for efficient acid circulation, which directly impacts production quality and cost-effectiveness.