The invention relates to the field of
water treatment chemicals, and particularly discloses a green and environment-friendly
corrosion and scale inhibitor. The environment-friendly
corrosion and scale inhibitor is prepared from modified polyepoxysuccinic acid, an
amino acid corrosion inhibitor, water and the like, and the preparation method of the modified polyepoxysuccinic acid comprises the following steps: adding
chitosan with the deacetylation degree of 70-85% into a
citric acid solution, and stirring until the
chitosan is dissolved to obtain a
chitosan citric acid solution; the preparation method comprises the following steps: adding absolute ethyl
alcohol into a chitosan
citric acid solution, uniformly stirring, heating and refluxing for 1-2h, cooling to 40-50 DEG C, adding polyepoxysuccinic acid, uniformly stirring, carrying out ultrasonic treatment for 2-4h, cooling to
room temperature, and finally adjusting the pH value to 5.5-7.0, thereby obtaining the modified polyepoxysuccinic acid. The green and environment-friendly corrosion and scale inhibitor prepared by the invention still has good scale inhibition performance in a high-temperature state, does not bring in
phosphorus, and has a green and environment-friendly effect.