Between the corrosion inhibitor on the metal surface by physical adsorption source inhibitor ions and metal surface charge generated by the electrostatic attraction and the Fan Dehua force. The electrostatic attraction plays an important role, this rapid, reversible adsorption, the adsorption heat small, little temperature influence. Metal and no specific combined inhibitor, but the metal surface charges influence greatly on the physical adsorption.
Metal surface without potential charge is called the zero charge potential of E, the corrosion potential of metals in a corrosive medium is greater than the potential of zero charge, the metal surface with positive charge, easy to adsorb anionic type inhibitor. When the metal corrosion potential than the potential of zero charge nurse, metal surface with negative charge, can be easily adsorbed cationic inhibitor when the corrosion potential is equal to zero charge, metal surface almost no charge, then easily adsorbed neutral molecular inhibitor.
No matter what kind of ion adsorbed on the metal surface, as long as it can form a layer of intact adsorption film, electrode reaction on metal has the effect of inhibiting and slow down the corrosion, the physical adsorption inhibitor protection film, mostly belongs to the cathode is suppressed, the adsorption of anion.
Physical adsorption in the polar groups, non polar groups and metal surface angle is not fixed. Such as alkyl amine at low concentration, the alkyl is inclined to the metal surface, with the increase of concentration, gradually inclined vertical. From different angles, corrosion inhibitor on the metal surface covered area not the same. Cover a large area, good anticorrosion effect.
Corrosion inhibitor is an important method for the protection of metal, there are a lot of understanding for corrosion inhibitors and metal, with the infiltration of various disciplines on corrosion science, and this expansion of this growing awareness. There are models with corrosion of metal surfaces by acting against corrosion. The form and function of the extent of the role of inhibitors and metal surfaces and types of metal and corrosion inhibitors are closely related, but also affected by corrosive environments.
Metal surface without potential charge is called the zero charge potential of E, the corrosion potential of metals in a corrosive medium is greater than the potential of zero charge, the metal surface with positive charge, easy to adsorb anionic type inhibitor. When the metal corrosion potential than the potential of zero charge nurse, metal surface with negative charge, can be easily adsorbed cationic inhibitor when the corrosion potential is equal to zero charge, metal surface almost no charge, then easily adsorbed neutral molecular inhibitor.
No matter what kind of ion adsorbed on the metal surface, as long as it can form a layer of intact adsorption film, electrode reaction on metal has the effect of inhibiting and slow down the corrosion, the physical adsorption inhibitor protection film, mostly belongs to the cathode is suppressed, the adsorption of anion.
Physical adsorption in the polar groups, non polar groups and metal surface angle is not fixed. Such as alkyl amine at low concentration, the alkyl is inclined to the metal surface, with the increase of concentration, gradually inclined vertical. From different angles, corrosion inhibitor on the metal surface covered area not the same. Cover a large area, good anticorrosion effect.
Corrosion inhibitor is an important method for the protection of metal, there are a lot of understanding for corrosion inhibitors and metal, with the infiltration of various disciplines on corrosion science, and this expansion of this growing awareness. There are models with corrosion of metal surfaces by acting against corrosion. The form and function of the extent of the role of inhibitors and metal surfaces and types of metal and corrosion inhibitors are closely related, but also affected by corrosive environments.