A review of hydrogen flux promoters

This paper provides a concise review of 'hydrogen promoters', aqueous corrodants  known to  generate  hydrogen flux through mild steel at low temperatures.  A new theory of hydrogen promotion will be presented.   Hydrogen promoters will be ranked according to their severity.  The role of temperature, scale, surface coatings and surface condition will also be considered. 

The paper should provide useful reference material for those interested in field and laboratory measurements of hydrogen flux, and the relation between the two.