Corrosion and stress corrosion cracking of FeNiMoxB alloys in several neutral and acidic media

Corrosion and stress corrosion cracking behaviour of a series of amorphous iron alloys FeNiMoxB (x = 0, 2, 4, 8.5) has been investigated in several neutral and acidic media. In particular in aqueous solutions of ferric chloride, potassium tetrathionate and several cases polarization curves have been recorded in order to clarify the electrochemical behaviour of the amorphous alloys. SEM observations of the fracture surfaces have been performed. It has been observed that the glassy alloys under investigation are susceptible to SCC at free corrosion potential in all the environments.