Fig. 5: SEM images of CaSO4 scale at different magnifications.
From: Nanosilica modified with polyaspartic acid as an industrial circulating water scale inhibitor
a, a’ Without antiscalant, b, b’ with 2 mg/L PASP, c, c’ with 4 mg/L PASP, d, d’ with 2 mg/L SiO2–NH2/PASP, e, e’ with 4 mg/L SiO2–NH2/PASP.
