How does surface condition affect the absorption of hydrogen during transport?

Introduction

The condition of the surface in hydrogen transport plays a role in the absorption of hydrogen. An oxide-free surface, particularly in the presence of a fresh crack, can increase the absorption rates of hydrogen.

Answer

Surface condition, specifically the absence of oxide scale, can affect the absorption of hydrogen during transport. In the presence of a fresh crack and an oxide-free surface, molecular hydrogen can be adsorbed on the surface and subsequently dissociate into atomic hydrogen. It’s important to note that the amount of hydrogen absorbed into the material through this process is generally low.