Study on Properties of Cold-Sprayed Al-Zn Coating on S135 Drill Pipe Steel

Figure 9

SEM diagram of surface morphology of coating after corrosion: (a) 40% Al-60% Zn, (b) 30% Al-70% Zn, and (c) 20% Al-80% Zn.

(a)

(b)

(c)