CPC C23F 11/173 (2013.01) [C08K 3/08 (2013.01); C08L 1/286 (2013.01); C08L 5/02 (2013.01); C08L 5/04 (2013.01); C08L 5/06 (2013.01); C23G 1/063 (2013.01); C08K 2003/0806 (2013.01); C08K 2201/003 (2013.01); C08L 2201/08 (2013.01)] | 8 Claims |
1. A method of inhibiting corrosion of metal during acid cleaning/pickling, the method comprising:
treating the metal with an acidic treatment fluid comprising 1 to 5 wt. % of an acid, based on a total weight of the acidic treatment fluid, and 0.1 to 5 vol. % of a corrosion inhibitor composition based on a total volume of the acidic treatment fluid
wherein the corrosion inhibitor composition comprises:
a base fluid comprising water and an alcohol;
a mixture of at least three polysaccharides selected from the group consisting of carboxymethyl cellulose, gum arabic, pectin, a salt of alginic acid, chitosan, dextran, hydroxyethyl cellulose, and soluble starch, with each polysaccharide that is present in the mixture being present in an amount of 0.05 to 0.5 wt. %, based on a total weight of the corrosion inhibitor composition;
silver nanoparticles; and
a pineapple leaves extract,
wherein the corrosion inhibitor composition provides a hydrodynamic corrosion rate of less than 0.0008 mpy on Grade-2 Ti when applied at a concentration of 0.3-1 wt % after 168 hours of exposure to a 2% HCl solution in seawater at a temperature of 40-70° C.
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