The synthesis of a corrosion inhibitor and its application as a replacement of amine corrosion inhibitors in the cooling tower of thermal power plants are proposed here. In the next step, the performance of the proposed inhibitor is compared with other commercial amine corrosion inhibitors from a technical-economic point of view. ABased on the results from the performance tests, the technical-economic justifications of using this inhibitor in the cooling tower of industries and especially power plants are investigated. The corrosion rate in the absence of corrosion inhibitors for corrosion coupons of carbon steel, copper and admiralty is two times higher than the corrosion rate in the presence of commercial inhibitors (PBTC and HEDP) and 4 times higher than the proposed inhibitor (FNSI). Based on the CV results in corrosive environment, the lowest corrosion rates are related to FNSI, PBTC and HEDP, respectively. Therefore, the proposed inhibitor is selected as the superior inhibitor in CV test. To investigate the effect of copper scale inhibition, the HEDP inhibitor has a very good anti sealant effect and other commercial and proposed inhibitors do not have much anti sealant effect. On the other hand, the proposed inhibitor has the ability to be recovered and reused which other inhibitors do not have these properties. This synthetic inhibitor is made from disposable materials, is available, cheap (rice husk), environmentally friendly and can be prepared at a lower cost.