Effects of copper based alloys on the nucleation and growth of calcium carbonate scale

Glycine-Mediated, Selective Preparation of Monodisperse Spherical Vaterite Calcium Carbonate in Various Reaction Systems

“…When the temperature was enhanced to 680 °C, the products 1f began to decompose, and the rate of decomposition reached a maximum at 780 °C. The temperature reduced 174 °C in comparison with the decomposing T of reference CaCO 3 , which was attributed to lower activation energy of decomposition than bulk CaCO 3 , − because of the high surface energy of vaterite particles.…”

“…Moreover, the effects of other amino acids including alanine (Ala), − leucine (Leu), and aspartic acid (Asp) reported in the literature on the formation of spherical vaterite CaCO 3 were evaluated under the conditions for the formation of product 1f . As shown in Figure S6, Ala could not afford single-component vaterite with 10% calcite CaCO 3 , and Leu only gave calcite CaCO 3 , probably indicating that steric hindrance of amino acid was a key factor to determine the selection of crystal polymorphs CaCO 3 .…”

“…Although the metastable phase vaterite is difficult to synthesize under conventional laboratory conditions, the importance of vaterite CaCO 3 in nature has led to extensive studies of vaterite crystallization by added organic/inorganic or used templates. − Amino acids are common used additives in inducing vaterite CaCO 3 . Manoli et al have studied the kinetics of vaterite crystallization on calcite in the presence of alanine, glycine, lysine, as well as on lysine, glutamic acid, polyglycine, polytyrosine, and polymethionine. , Kai et al indicated that noncharged and polar amino acids and those of the acidic ones in CaCO 3 precipitates tended to stabilize the vaterite phase, and the vaterite content in CaCO 3 precipitates is correlated to the concentration of amino acids in the precipitates .…”

Nonchemical Methods to Control Scale and Deposit Formation

“…Tang et al [63] studied the effects of copper-based alloys on the nucleation and growth of calcium carbonate scales on steel plates. Their results showed a decrease in the surface tension and oxidationereduction potential of artificial hard water, and there was a longer induction period after the hard water was exposed to copper-based alloys.…”

Rapid development of thickness‐controllable superamphiphobic coating on the inner wall of long narrow pipes

“…In theory, CaCO 3 has three polymorphs: calcite, aragonite, and vaterite. Among the crystals that appeared on the inner walls of the pipe, the crystal form of needlelike CaCO 3 is standard aragonite, which is typically formed on supersaturated conditions and is considered easier to remove for their lower adhesive strength . The different growth modes on the two surfaces can be explained as follows.…”