000			01744nab a2200205 4500
005			20260520000923.0
008			260224s2011 xxu
245	0	0	_aCorrosion behavior of AZ magnesium alloys with Al and Al-11 Si thermal spray coatings
260			_a _b _cfeb. 2011
270			_a22/02/2011 ; 22/02/2011
300			_a14 p. ; 025003
520			_aTranscripción del resumen del autor. The corrosion behavior of AZ31, AZ80, and AZ91D Mg-Al-Zn alloys coated with aluminum and Al-11Si thermal spray was evaluated in 3.5 wt% sodium chloride (NaCl) solution at 22°C by gravimetric and electrochemical impedance spectroscopy (EIS) measurements. The corrosion products were examined using scanning electron microscopy (SEM), energy-dispersive x-ray analysis (EDX), and low-angle x-ray diffraction (XRD). The as-sprayed aluminum and Al-11 Si coatings were porous, and galvanic corrosion of magnesium substrates was observed at the substrate/coating interfaces. Application of a cold-pressing posttreatment smoothed and densified the coatings, improved the contact between coating and substrate, and substantially increased the corrosion resistance. Cold-pressed aluminum coatings were an effective barrier against corrosion and revealed the same corrosion performance, regardless of the composition of the magnesium substrate. However, cold-pressed Al-11Si coatings were permeable to the chloride-containing solution, and galvanic corrosion of magnesium substrates was observed after a few days of immersion in 3.5 wt% NaCl solution.
581			_a2
773	0		_tCorrosion _g67
942			_cARTICULO
100	1		_aPardo, A. _934232
100	1		_aMerino, M.C. _934233
100	1		_aArrabal, R. _943511
999			_c173474 _d173474