AA7075 AC corrosion assessment AC interference corrosion AlSi-based coating CrFeCoNiNbx alloys Fourier transform J55 steel Mg MoSi2-ZrB2 coating Nb-Si based alloy Ni-W alloy coating Pyrowear 675/AMS 5930 Raman spectroscopy Rayleigh–Lamb equation Research & information: general SEM XPS Zamak Zn Zn-Al alloys Zr hydride acid inhibition additive manufacturing aerospace alloy 625 alternating current aluminium alloys aluminum oxide atmospheric plasma atomic force microscopy (AFM)