The invention discloses a
carbon steel rust remover and its preparation method and application, and relates to the technical field of
metal rust removal and cleaning, wherein the
rust remover comprises 30%-45% of
organic acid, 1%-4% of
thiol PEG amine, 0.5%-1% of
quaternary ammonium salt, 1%-2% of
organic solvent and surplus deionized water, based on the total
mass of the
rust remover. In the present invention, the sulfhydryl and amino groups in the
thiol PEG amine molecule form a structurally stable coordination chelate film on the surface of a
metal matrix, which can inhibit the excessive
corrosion of aminosulfonic acid to a
metal matrix; the chelate film formed by the
thiol PEG amine contains a large amount of
oxygen atoms, and under the action of
hydrogen bonds, it is combined with
quaternary ammonium salt to significantly improve the
corrosion potential, and further enhance the
corrosion resistance of the metal; the
rust remover of the present invention can be used to remove rust and clean rusted
carbon steel in a short time, and the effect is good, and the rust removal process will not damage the metal body.