The transfer of sound corrosion knowledge from human experts to dedicated soflware tools has been individuated as a strategic activity, and, accordingly, a number of applications have been developed
in recent years. This approach to corrosion, which represents a new phase, coming after those of corrosion science and corrosion engineering, has been labelled “corrosion intelligence’’, and it
matches several needs of an oil company, as: standardisation of design procedures; “capitalization” of available knowledge in programs easy to update; decentralisation of the expertise. The paper illustrates an expert system dealing with all aspects related to oil and gas pipeline corrosion,
including: internal and external corrosion; material selection and corrosion control requirement internal corrosion monitoring; coatings; cathodic protection; corrosion in transient phases, intelligent
pig inspection; costs comparison. In particular, the modules for internal and external corrosion assessment are described. The general architecture of the application, based on independent expert
modules, is discussed in detail and examples of results, with relevant interfaces, are shown. The expert system is also evaluated with respect to another software application for the assessment of corrosion risks.
Keywords: corrosion, expert systems, oil and gas, pipelines.