Corrosion product chemical dissolution process

A method for removing corrosion products from a system, the method comprising:

• adjusting the system temperature to between 115° F. to 212° F.;
• injecting a cleaning dissolution solvent including oxalic acid into the system;
• injecting a gas into the system after the system is filled with the cleaning dissolution solvent, the gas mixing with the solvent in the system;
• draining the solvent from the system after a predetermined period of time of dissolution;
• injecting a passivation composition including oxalic acid into the system;
• injecting a gas into the system, the gas mixing the passivation composition, the oxalic acid in the passivation composition converting ferrous oxalate resulting from the cleaning dissolution solvent into ferric oxalate;
• draining the system of the composition after a predetermined period of time of passivation;
• rinsing the system with a low volume solution after draining the system of the composition;
• and
• rinsing the system with a full volume solution.