Hydrogen, in small quantities, damages metallic materials and reduces their serviceability. Several phenomena associated with hydrogen are shown here.

1. HYDROGEN DAMAGE OF METALLIC MATERIALS T.K. G. NAMBOODHIRI PROFESSOR OF METALLURGICAL ENGINEERING (Retired) BANARAS HINDU UNIVERSITY VARANASI

3. Classification of hydrogen damage HYDROGEN ENVIRONMENT EMBRITTLEMENT CRACKING DEGRADATION OF OTHER MECHANICAL PROPERTIES LOSS IN TENSILE DUCTILITY SLOW STRAIN RATE EMBRITTLEMENT HYDROGEN EMBRITTLEMENT HYDRIDE EMBRITTLEMENT HYDROGEN DAMAGE SOLID SOLUTION HARDENING HIGH STRAIN RATE EMBRITTLEMENT CREATION OF INTERNAL DEFECTS POROSITY SHATTER CRACKS , FLAKES, FISH EYES BLISTERING HYDROGEN ATTACK HYDROGEN STRESS

5. HYDROGEN EMBRITTLEMENT HYDROGEN EMBRITTLEMENT HYDROGEN ENVIRONMENT EMBRITTLEMENT HYDROGEN STRESS CRACKING LOSS IN TENSILE DUCTILITY & OTHER MECHANICAL PROPERTIES

15. H induced fracture morphology