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Iron Removal Replacement

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WTP Applications

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The theory of the restraint of rust

  • The progress of rust will depend upon the conditions relating to water including the period of time of water staying in the pipe, water temperature, PH, residual chlorine and dissolved oxygen.
  • Treated water with our device are so activated by Electrokinetic Phenomena that the treated water could penetrate into the rust softly adhered, and the rust becomes less harder and larger in dimensions. Further, such rust could become much less sticky and be removed eventually.

It is considered that after the removal of the rust, the inside of the pipe has turned out to be with black rust so that it could prevent red rust from being formed.

Mechanism of corrosion prevention

  • Red Rust exists as Ｆe2O3（Ⅲ） in water
  • The treated water with our device reacts and is reduced into Fe(OH)2 as follows:
    Ｈ+ + Ｏ2 + e- → ＨＯ2
    Fe(OH)3 + HO2 → Ｆe(OH)2+H2O+O2
  • Red rust is dissolved by activated water and reduced Fe(OH)2 is combined with Fe(OH)３,and it makes black rust asＦe(OH)8 in water.
  • Ｆe(OH)2 + 2Fe(OH)３ → Ｆe(OH)8 （Black rust in water）
  • → 4 H2O +FeO4 （Black rust in the air）

The effect of prevention of oxidation and corrosion

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Kagoshima prefecture one steel manufacturing company

The compressor which had been in operation for three months after being cleaned without the chemical treatment. The compressor was uncovered and checked by sight. It was found that the inside of the cover and the tube had been in progress of being rusted, and the tube was partially choked with rust.

Three months after the installation of LTIWET

The compressor which had been in operation for three months after being cleaned without the chemical treatment and SRD being installed on the circulation pipes of the cooling water for the compressor was uncovered and checked by sight. It was found that the inside of the cover and the tube had been with black rust, and the tube was not choked with rust.