Elucidation of the scale prevention effect by alternating magnetic treatment

S. Umeki, T. Kato, H. Shimabukuro, N. Yoshikawa, S. Taniguchi, K. Tohji

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Citations (Scopus)


Process industry remains skeptical of the effect of scale prevention in a water pipe by magnetic treatment despite its long history. In this study, mechanism of scale prevention by "alternating" magnetic treatment was investigated. Using suspensions of non-magnetic colloid particles (TiO 2 or CaCO3) dispersed in an electrolytic solution, we investigated zeta potential changes of the particles by imposition of alternating magnetic field with a specific frequency. Consequently, we found that the specific frequency treatment (several kHz) changes the zeta potential of particles drastically with an inversion of sign. This phenomenon obviously depends on the frequency. It is considered to be due to the specific adsorption of anions, that were easily adsorbed, in the solution onto the particles interface. From the experimental results, we concluded the mechanism of scale prevention by the treatment as follows: Normally, a surface of inner wall of a water pipe has negative charge and surface of scale particles in water has positive charge. So the particles are attracted by the water pipe and are attached to it. After the treatment, surface potential of the particles shifts to negative side, then repulsive force is formed between the particles and the wall.

Original languageEnglish
Title of host publicationWATER DYANMICS
Subtitle of host publication4th International Workshop on Water Dynamics
Number of pages5
Publication statusPublished - 2007
Event4th International Workshop on Water Dynamics - Sendai, Japan
Duration: 2006 Nov 72006 Nov 8

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference4th International Workshop on Water Dynamics


  • Interface potential
  • Magnetic treatment
  • Scale
  • Water
  • Zeta potential


Dive into the research topics of 'Elucidation of the scale prevention effect by alternating magnetic treatment'. Together they form a unique fingerprint.

Cite this