Case Study - 5: Hydrogen Rupture in Boiler Tubes

The rupture observed is due to hydrogen induced cracking. Hydrogen is a normal product between iron and water. Atomic hydrogen formed at a corrosion site can combine with other hydrogen atoms to form molecular hydrogen. Tremendous pressure develops as hydrogen gathers within the voids and causes blister formation. These blisters cause the metal to rupture.

Use quality API grade with few voids and inclusions. Reduce to remove arsenic, phosphorous and compounds etc. All deposits must be removed by chemical cleaning.