In order to understand the hydrolysis mechanism of activated aluminum by bismuth

Al-Bi-NaCl

AlCu-NaCl and Al-Sn-NaCl composites were prepared by ball milling.By hydrogen production experiment

it is found that the effect of Al-Bi micro-galvanic cells on promoting hydrolysis of aluminum can be ignored.The composites were characterized by X-ray diffractometer

scanning electron microscope and electrochemical workstation.The results show that brittle and hard Bi is more likely to be embedded in soft

pure aluminum during ball milling

resulting in more defects such as crystal lattice

holes

cracks

rough surfaces

which are responsible for promoting hydrogen production from aluminum hydrolysis as a result of the Al-based composites in a highly active state.The addition of bismuth during ball milling can result in a large negative shift in the electrode potential of the aluminum powder

which can accelerate the corrosion of aluminum to a certain extent.