Determining corrosion rates

A corrosion sensing system comprising:

• a corrosion sensor comprising:
• a corrodible layer having a front face and a back face opposite the front face;
• a fiber Bragg grating sensor layer having a front face and a back face opposite the front face, the front face of the fiber Bragg grating sensor layer coupled to the back face of the corrodible layer;
• a corrosion resistant layer covering the back face of the fiber Bragg grating sensor layer;
• and
• a corrosion resistant material coupled to edges of the corrodible layer and the fiber Bragg grating sensor layer;
• a light source coupled to the fiber Bragg grating sensor layer;
• at least one light detector coupled to the fiber Bragg grating sensor layer;
• and
• a data acquisition module comprising at least one processor communicatively coupled to the corrosion sensor.

A method for determining a corrosion rate in a pipeline, the method comprising:

• installing a corrosion sensor in a pipeline, the corrosion sensor comprising a corrodible layer having a front face and a back face opposite the front face, a fiber Bragg grating layer having a front face and a back face opposite the front face, the front face of the fiber Bragg grating layer coupled to the back face of the corrodible layer, and a corrosion resistant material covering the back face and edges of the fiber Bragg grating laver;
• providing light to the fiber Bragg grating layer;
• detecting light reflected from the fiber Bragg grating layer;
• determining a thickness of the corrodible layer based on the detected light reflected from the fiber Bragg grating layer, and
• determining a corrosion rate based on the determined thickness of the corrodible layer.