Sensor system for corrosion monitoring

A sensor system for corrosion monitoring (100) for monitoring corrosion in a pipeline/vessel wall (200), comprising:

• an optical fiber (300) provided with means for converting an acoustic signal to an optical signal,
• at least one acoustic emitter (400), the acoustic emitter (400) being positioned at a specific point along the wall sending an acoustic wave from the group comprising ‘lamb waves’, longitudinal waves, transverse waves, shear waves, Rayleigh waves, Stonely waves and Sezawa love waves through the wall to a receiver positioned further along the wall, wherein the propagation time of said wave is a function of the average wall thickness, between the emitter and receiver,
• wherein during the operations the acoustic emitter (400) emits an excited beam (450) which then is reflected as reflected beam (460) which then is received by the optical fiber, wherein the fiber is also further provided with a sensitive material that allows for corrosion related chemical parameters to be measured in a continuous fashion over the length of the fiber (330).