11632 Prevention of HE

Measures used to avoid HE involve either removal of any diffused hydrogen or prevention of hydrogen adsorption on the metal surface. Metallic, inorganic, and organic coatings may be used to prevent hydrogen adsorption on the metal surface. Inhibitors and additives that reduce the corrosion rate or increase the rate of hydrogen gas evolution can be helpful. Furthermore as hydrogen diffusion increases with temperature, low-temperature heat treatments may be used to remove any diffused hydrogen, Modification of material chemistry is also possible, for example, in steels small amounts of Ti and V may be added that act as H traps reducing the diffusion rate of H in the steel.

0 0

Post a comment