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Metal structures exposed to marine or coastal environments can experience time-dependent deterioration of their mechanical properties. Corrosion and hydrogen embrittlement are two mechanisms by which the mechanical properties of a system can be detrimentally reduced. Steel structures can be very susceptible to hydrogen embrittlement, particularly in marine environments where hydrogen is present due to corrosion processes and cathodic protection systems. As the use of high strength steels becomes more common in offshore structures, it becomes increasingly important to understand the phenomenon of hydrogen embrittlement. Corrosion characteristics of several plasma sprayed TiN-Al and Ti02-Al composite coatings on steels in salt water were discussed. Coatings can be developed with or without other suitable undercoatins and they can also be protected by suitable topcoasts. Results indicate that the addition of TiN and, possibly, other such compounds to aluminum coatings on steels would be beneficial in improving their erosion/corrosion resistance. A coating of TiN does corrode in salt water, but adding aluminum to it improves corrosion resistance.