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Although industrial cooling water by filtration, purification process, using water quality standards, but in the cycle of physical and chemical conditions change, water quality has changed, a variety of ion concentration, increasing the amount of dissolved gases, contact with the atmosphere produce bacteria and must therefore be corrosive to equipment, damage to production equipment, affecting the normal production run. Increase in the circulating water corrosion inhibitor is the most common method to reduce water on the corrosion of equipment, extending its life, increase productivity, organic phosphonic acid compounds as molecules in a stable CP bond, hydrolysis is not easy to have their good corrosion and scale, and thus widely used. However, previously used as low molecular weight organic acid, organic phosphoric acid group limited number, to use imposed. Therefore, we synthesized an unsaturated organic acid, and then make it aggregated to get diversity of high molecular weight organic acid polymer, the indoor experiments and field applications show that a good inhibition effect, inhibition rate, a kind of ideal cooling water corrosion inhibitor.