The effect of a phosphate treatment as a corrosion inhibitor for a RE-iron-boron magnet has been investigated. The corrosion characteristics of the magnet in a phosphate solution, which consisted of 0.15 M NaH/sub 2/PO/sub 4/, were analyzed by electrochemical impedance and electrochemical noise measurements. The immersion of the magnet in the phosphate solution resulted in the formation of a passive layer on its surface causing a prolonged corrosion protection, after removal from the solution. The protective layer was found to consist of phosphate/pyrophosphate and oxide by XPS analysis.
No takes yet. Share an insight, caveat, or question.
Costa et al. (1997) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: