Patent · US Expired

Plate-type heat exchanger with anodic corrosion protection

US7225863B2 · kind B2 · utility

3Cited by

10References

5Claims

0Family size

Assignee

Outokumpu Oyj · FI

Inventors

Nikola Anastasijevic · Schongau, DE
Karl-Heinz Daum · Mainz, DE
Wolfram Schalk · Bad Homburg vor der Höhe, DE
Stefan Laibach · Treffurt, DE

Key dates

Filing date	May 28, 2002
Grant date	Jun 5, 2007
Priority date	—
Expiry date	Apr 4, 2023

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC23F13/005
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

To protect a plate-type heat exchanger (1) against corrosion due to the attack of sulfuric acid, it is proposed in accordance with the invention that the region through which flows sulfuric acid has at least one metal cathode (16, 17) and one reference electrode (27), that at least half the metal plates (7) have an electric contact (23) which is connected with the anode (21) of an electric d.c. voltage source of variable electric voltage, that the metal cathode (16, 17) likewise is electrically connected with the d.c. voltage source, and that the d.c. voltage source belongs to a potentiostat (20) which is electrically connected with the reference electrode (27).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.