Selectively corrodible downhole article and method of use

A method of removing a selectively corrodible downhole article, comprising:

• disposing downhole a selectively corrodible downhole article, comprising:
• a movable cylindrical member comprising a first section and an axially separated second section, the first section comprising a first material having a first galvanic activity, the second section comprising a second material having a second galvanic activity, the first galvanic activity being greater than the second galvanic activity, the first section being electrically isolated from the second section;
• and a fixed member disposed on the cylindrical member and configured for electrical contact with the first section or the second section, the fixed member comprising an intermediate material having an intermediate galvanic activity, the intermediate galvanic activity being between the first galvanic activity and the second galvanic activity, the movable cylindrical member configured for movement from a first position where the first section is disposed on and in electrical contact with the fixed member and a second position where the second section is disposed on and in electrical contact with the fixed member, wherein in the first position, the first section is configured for selective dissolution, and wherein in the second position, the fixed member is configured for selective dissolution;
• exposing the selectively corrodible downhole article to a first wellbore fluid while the movable cylindrical member is in the first position, wherein the first section is selectively dissolved;
• moving the movable cylindrical member to the second position;
• and
• exposing the selectively corrodible metallic downhole article to a second wellbore fluid, wherein the fixed member is selectively dissolved.