Surface treatment process and device for heat exchangers

Details Surface treatment process and device for heat exchangers Surface treatment process and device for heat exchangers

1986-08-05

1989-05-02

Niebling, John F.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204224R, 204224M, 204225, 204272, C23F 1300, C23F 1302, C25D 1710

Patent

active

048265829

ABSTRACT:
A device (50) for treating the inner surface of a steam generator heat exchange tube (1) is introduced into the tube (1), the region to be treated is isolated from the remainder of the tube (1), an electrolyte is circulated in this region to carry out the treatment, an electrical field is created between the treatment device (50) and the tube (1) to produce a migration of ions in both directions, the electrical field created is reduced to zero, the electrolyte is removed to a treatment unit and then a compressed-air purge is carried out, the treated region is rinsed with demineralized water and the water is drained, and, lastly, an additional compressed-air purge is carried out.

REFERENCES:
patent: 1982009 (1931-11-01), McKinney
patent: 2764540 (1956-09-01), Farin
patent: 3857772 (1974-12-01), Sasaki
patent: 4120760 (1978-10-01), Ueda
patent: 4250011 (1981-02-01), Capello
patent: 4705611 (1987-11-01), Grimes

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