Investigation of the initial period of sulphate scale formation Part 2. Kinetics of calcium sulphate crystal growth at its crystallization on a heat-exchange surface

✍ Scribed by Oleg D. Linnikov

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 646 KB
• Volume: 128
• Category: Article
• ISSN: 0011-9164
• DOI: 10.1016/s0011-9164(00)00021-7

✦ Synopsis

Experimental data on calcium sulphate crystal growth (gypsum) from electrolytic solutions on a heated metal surface were considered. It was shown that crystals grew along a heat transfer surface, in parallel to it. The growth kinetics in the direction [100] under investigated experimental conditions were described by a quadratic dependence to supersaturation. The crystal growth in the direction [001] under the same conditions occurred in a mixed mode according to mononuclear growth mechanism by means of two-dimensional nucleus formation on the crystal surfaces. The specific surface energy and activation energy of the crystal growth process were determined.