Answer to a power station problem: CHEMICAL MONITORING FOR CORROSION

THE MOST reliable measure of any anti‐corrosion treatment in a fluid carrier is to monitor continuously for the products of corrosion; the failure of the system or treatment then becomes evident long before serious damage results—axiomatic perhaps, but difficult. In fact, so difficult has such analysis proved to be in practice that the majority of corrosion measurements have been made on second‐order parameters, e.g. in water, the dissolved oxygen content, the hydrazine content, pH, conductivity and even electro‐potentials. From this accumulation of data one assumes that any change in the water background will show up as a change in one or more of these parameters.