EP 0285747 B1 19901227 - PROCESS AND APPARATUS FOR SUSTAINING THE CATHODIC PROTECTION OF METAL SURFACES
Title (en)
PROCESS AND APPARATUS FOR SUSTAINING THE CATHODIC PROTECTION OF METAL SURFACES
Publication
Application
Priority
DE 3707791 A 19870311
Abstract (en)
[origin: EP0285747A1] For corrosion protection of metallic surfaces in contact with an electrolyte by an external current, using an inert electrode as the external current anode, and a potentiostat, the protective current being periodically switched off and the actual potential (Eact) being measured directly between the external current anode acting in this phase as reference electrode and the surface to be protected and being compared with the protective potential (Eset) set on the potentiostat, and the difference (Eact-Eset) being utilised directly as the control variable for the protective current, it is intended that the protective potential just prevailing at the time is measurable and hence readjustable independently of the protective current which has flowed through. This is achieved when the potential (Eact) is measured after a slight time interval after switching-off and is utilised in the control phase as the control variable for the protective current flowing during the switched-on time. <IMAGE>
IPC 1-7
IPC 8 full level
C23F 13/02 (2006.01); C23F 13/04 (2006.01)
CPC (source: EP)
C23F 13/04 (2013.01)
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0285747 A1 19881012; EP 0285747 B1 19901227; AT E59414 T1 19910115; DE 3707791 C1 19880331; DE 3861403 D1 19910207; ES 2020584 B3 19910816; GR 3001389 T3 19920911; NO 172352 B 19930329; NO 172352 C 19930707; NO 880790 D0 19880223; NO 880790 L 19880912
DOCDB simple family (application)
EP 88100558 A 19880116; AT 88100558 T 19880116; DE 3707791 A 19870311; DE 3861403 T 19880116; ES 88100558 T 19880116; GR 900401039 T 19910128; NO 880790 A 19880223