关键词: fouling;induction period;micro video;new surface material

Abstract: Fouling induction period of CaCO3 on heated surface was studied with themicro video
technology. The rates of nucleating and nuclei growing weremeasured under various
experimental conditions. The experimental resultsshowed that both nucleating and nuclei
growing rates of CaCO3 increased obviouslywith surface temperature and concentration of
reagents. In addition, theexperiment of fouling induction period on the surface material of
chemicalplated nickel-phosphorus-polytetrafluoroethylene indicated that not only
thenucleate rate of CaCO3 decreased but also some fouling particles with certainsize were
easy to peel off from the heated surface under shearing stress,which means that the
property of surface material is one of the most importantfactors influencing fouling
induction periods.

Key words: fouling, induction period, micro video, new surface material