The present invention relates to a Z-type heterojunction photoanode film used for the photocathode protection of a reinforcing bar, the preparation method thereof and a method for the corrosion inhibition of mental materials from concrete structures in marine engineering by using the Z-type heterojunction photoanode film used for the photocathode protection of a reinforcing bar. The preparation method includes steps of preparing Fe.sub.2O.sub.3 on the conducting surface of a clean conductive substrate through the hydrothermal process, preparing Fe.sub.2O.sub.3-PANI composite photoanode film by depositing polyaniline on the surface of Fe.sub.2O.sub.3 through the electrochemical synthesis and preparing Ru-Fe.sub.2O.sub.3-PANI composite photoanode film on the surface of the Fe.sub.2O.sub.3-PANI composite photoanode film through the in situ chemical reduction method. The technical solution in the present invention can achieve highly effective photocathode protection of a reinforcing bar from concretes in marine engineering and improve the durability of concrete structures in marine engineering.

The present invention relates to a Z-type heterojunction photoanode film used for the photocathode protection of a reinforcing bar, the preparation method thereof and a method for the corrosion inhibition of mental materials from concrete structures in marine engineering by using the Z-type heterojunction photoanode film used for the photocathode protection of a reinforcing bar. The preparation method includes steps of preparing Fe.sub.2O.sub.3 on the conducting surface of a clean conductive substrate through the hydrothermal process, preparing Fe.sub.2O.sub.3-PANI composite photoanode film by depositing polyaniline on the surface of Fe.sub.2O.sub.3 through the electrochemical synthesis and preparing Ru-Fe.sub.2O.sub.3-PANI composite photoanode film on the surface of the Fe.sub.2O.sub.3-PANI composite photoanode film through the in situ chemical reduction method. The technical solution in the present invention can achieve highly effective photocathode protection of a reinforcing bar from concretes in marine engineering and improve the durability of concrete structures in marine engineering.

A corrosion resistant article including an aluminum substrate and a corrosion-inhibiting cerium based corrosion inhibitor corrosion inhibiting additive on the aluminum substrate, the corrosion inhibiting additive comprising an anodic corrosion inhibitor and a cathodic corrosion inhibitor, the anodic corrosion inhibitor greater than 25 wt % of the total inhibitor.

A corrosion resistant article including an aluminum substrate and a corrosion-inhibiting cerium based corrosion inhibitor corrosion inhibiting additive on the aluminum substrate, the corrosion inhibiting additive comprising an anodic corrosion inhibitor and a cathodic corrosion inhibitor, the anodic corrosion inhibitor greater than 25 wt % of the total inhibitor.

The present invention relates to an electric anticorrosive potential measurement electrode unit for measuring an anticorrosive potential of an anticorrosive object (30) buried underground, and comprises: a first electrode unit (10) buried underground near the anticorrosive object (30); and a second electrode unit (20) buried so as to be separated by a distance (D) from the first electrode unit (10) and measuring a comparative potential relative to the first electrode unit (10).

The present invention relates to an electric anticorrosive potential measurement electrode unit for measuring an anticorrosive potential of an anticorrosive object (30) buried underground, and comprises: a first electrode unit (10) buried underground near the anticorrosive object (30); and a second electrode unit (20) buried so as to be separated by a distance (D) from the first electrode unit (10) and measuring a comparative potential relative to the first electrode unit (10).

Provided is an anticorrosion device that does not require the installation of electrical equipment and has no concern about loss of anticorrosion effect due to deterioration of the anode. An anticorrosion device that prevents corrosion of a metal material in a structure, including a thermoelectric power generation unit 10 configured to generate an electromotive force due to a temperature gradient, an anode unit 20 that is responsible for an anode reaction corresponding to the electromotive force, and a cathode unit 30 that is responsible for a cathode reaction corresponding to the electromotive force, in which the cathode unit 30 is a metal material (target metal) in the structure.

Provided is an anticorrosion device that does not require the installation of electrical equipment and has no concern about loss of anticorrosion effect due to deterioration of the anode. An anticorrosion device that prevents corrosion of a metal material in a structure, including a thermoelectric power generation unit 10 configured to generate an electromotive force due to a temperature gradient, an anode unit 20 that is responsible for an anode reaction corresponding to the electromotive force, and a cathode unit 30 that is responsible for a cathode reaction corresponding to the electromotive force, in which the cathode unit 30 is a metal material (target metal) in the structure.

The present invention relates to a Z-type heterojunction photoanode film used for the photocathode protection of a reinforcing bar, the preparation method thereof and a method for the corrosion inhibition of mental materials from concrete structures in marine engineering by using the Z-type heterojunction photoanode film used for the photocathode protection of a reinforcing bar. The preparation method includes steps of preparing Fe.sub.2O.sub.3 on the conducting surface of a clean conductive substrate through the hydrothermal process, preparing Fe.sub.2O.sub.3-PANI composite photoanode film by depositing polyaniline on the surface of Fe.sub.2O.sub.3 through the electrochemical synthesis and preparing Ru-Fe.sub.2O.sub.3-PANI composite photoanode film on the surface of the Fe.sub.2O.sub.3-PANI composite photoanode film through the in situ chemical reduction method. The technical solution in the present invention can achieve highly effective photocathode protection of a reinforcing bar from concretes in marine engineering and improve the durability of concrete structures in marine engineering.

The present invention relates to a Z-type heterojunction photoanode film used for the photocathode protection of a reinforcing bar, the preparation method thereof and a method for the corrosion inhibition of mental materials from concrete structures in marine engineering by using the Z-type heterojunction photoanode film used for the photocathode protection of a reinforcing bar. The preparation method includes steps of preparing Fe.sub.2O.sub.3 on the conducting surface of a clean conductive substrate through the hydrothermal process, preparing Fe.sub.2O.sub.3-PANI composite photoanode film by depositing polyaniline on the surface of Fe.sub.2O.sub.3 through the electrochemical synthesis and preparing Ru-Fe.sub.2O.sub.3-PANI composite photoanode film on the surface of the Fe.sub.2O.sub.3-PANI composite photoanode film through the in situ chemical reduction method. The technical solution in the present invention can achieve highly effective photocathode protection of a reinforcing bar from concretes in marine engineering and improve the durability of concrete structures in marine engineering.