Sacrificial anode for cathodic protection and alloy therefor

A reinforced concrete structure comprising a cementitious material, metal reinforcement, and a cathodic protection anode, said anode comprising an alloy of about 10% to about 50% Zn, about 0.2% to about 0.6% In, about 0.02% to about 0.2% Ce and the balance Al.

A method of providing cathodic protection to a reinforced concrete structure comprising:

• providing a reinforced concrete structure comprising a cementitious material and metal reinforcement, and
• introducing a cathodic protection anode into the reinforced concrete structure, said anode including an alloy comprising about 20% to about 50% Zn, about 0.2% to about 0.6% In and the balance Al.

A method of providing cathodic protection to a reinforced concrete structure comprising:

• providing a reinforced concrete structure comprising a cementitious material and metal reinforcement, and
• introducing a cathodic protection anode into the reinforced concrete structure, said anode including an alloy comprising about 10% to about 50% Zn, about 0.2% to about 0.6% In, about 0.02% to about 0.2% Ce and the balance Al.

An alloy for a sacrificial anode comprising about 20% to about 50% of Zn, about 0.2% to about 0.6% In, about 0.0005% to about 0.3% of at least one metal selected from Zr, Si, Ce, Ti, and B, and the balance Al.

An alloy for a sacrificial anode comprising about 20% to about 50% of Zn, about 0.2% to about 0.6% In, about 0.0005% to about 0.05% of Zr and the balance Al.

An alloy for a sacrificial anode comprising about 20% to about 50% of Zn, about 0.2% to about 0.6% In, about 0.05% to about 0.3% of Si and the balance Al.

An alloy for a sacrificial anode comprising about 20% to about 50% of Zn, about 0.2% to about 0.6% In, about 0.02% to about 0.2% of Ce and the balance Al.

An alloy for a sacrificial anode comprising about 20% to about 50% of Zn, about 0.2% to about 0.6% In, about 0.005% to about 0.1% of Ti, about 0.001% to about 0.02% of B and the balance Al.

An alloy for a sacrificial anode comprising about 10% to about 50% of Zn, about 0.2% to about 0.6% In, about 0.0005% to about 0.3% of at least one metal selected from Zr, Ce and B, and the balance Al.

An alloy for a sacrificial anode comprising about 10% to about 50% of Zn, about 0.2% to about 0.6% In, about 0.0005% to about 0.05% of Zr and the balance Al.

An alloy for a sacrificial anode comprising about 10% to about 50% of Zn, about 0.2% to about 0.6% In, about 0.05% to about 0.3% of Si, about 0.02% to about 0.2% Ce and the balance Al.

An alloy for a sacrificial anode comprising about 10% to about 50% of Zn, about 0.2% to about 0.6% In, about 0.02% to about 0.2% of Ce and the balance Al.

An alloy for a sacrificial anode comprising about 10% to about 50% of Zn, about 0.2% to about 0.6% In, about 0.005% to about 0.1% of Ti, about 0.001% to about 0.02% of B and the balance Al.