Corrosion monitoring

A corrosion monitoring method for monitoring corrosion of a metal member under heat transfer condition which corrodes in a corrosive fluid, comprising steps of:

• immersing a counter electrode or a reference electrode in the corrosive fluid,
• heating one substantial surface of a test coupon made of the same material as that of the metal member by a sheet shaped heating element;
• bringing at least one portion of the other surface of the test coupon into contact with the corrosive fluid;
• measuring electrical signals between the test coupon and the counter electrode or the reference electrode;
• and
• monitoring the corrosion of the metal member based on results of the measurement.

A corrosion monitoring apparatus for monitoring corrosion of a metal member under heat transfer condition which corrodes in a corrosive fluid, comprising:

• a test coupon made of the same material as that of the metal member;
• a sheet shaped heating element for heating one substantial surface of the test coupon;
• and
• detecting means for detecting status of corrosion of the test coupon when at least a portion of the other surface of the test coupon is brought in contact with the corrosive fluid.

A corrosion monitoring apparatus for monitoring corrosion of a metal member under heat transfer condition which corrodes in a corrosive fluid, comprising:

• a counter electrode or a reference electrode to be immersed into the corrosive fluid;
• a test coupon made of the same material as that of the metal member;
• a sheet shaped heating element for heating one substantial surface of the test coupon;
• and
• measuring means for measuring electrical signals between the test coupon and the counter electrode or the reference electrode when at least a portion of the other surface of the test coupon is brought in contact with the corrosive fluid.