PT65700A - Electrolytic colouring of eloxated aluminium - using switch circuit allowing equalising of changes during colouring and filter effects(NL161176) - Google Patents

Electrolytic colouring of eloxated aluminium - using switch circuit allowing equalising of changes during colouring and filter effects(NL161176)

Info

Publication number
PT65700A
PT65700A PT6570076A PT6570076A PT65700A PT 65700 A PT65700 A PT 65700A PT 6570076 A PT6570076 A PT 6570076A PT 6570076 A PT6570076 A PT 6570076A PT 65700 A PT65700 A PT 65700A
Authority
PT
Portugal
Prior art keywords
colouring
switch circuit
equalising
electrolytic
changes during
Prior art date
Application number
PT6570076A
Other languages
French (fr)
Portuguese (pt)
Other versions
PT65700B (en
Original Assignee
Emoresa Nac Del Aluminio Sa En
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Emoresa Nac Del Aluminio Sa En filed Critical Emoresa Nac Del Aluminio Sa En
Priority to PT6570076A priority Critical patent/PT65700B/en
Publication of PT65700A publication Critical patent/PT65700A/en
Publication of PT65700B publication Critical patent/PT65700B/en

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Abstract

Electrolytic colouring of eloxated Al with a power source supplying symmetrical, sinusoidal alternating current voltage, takes place by using a switch circuit in which the power source is connected with article to be coloured over 2 anti-parallel, independently controllable switch elements, pref. formed by thyristors. Initial filter effect of oxide layer can be controlled; electrical charges during colouring and subsequent later filter effect can be equalised. Articles having wide surface wt./vol. can be coloured without loosening oxide layer adhesion to substrate metal.
PT6570076A 1976-10-08 1976-10-08 AUTOMATIC CONTROL SYSTEM AND REGULATION OF THE AVERAGE VALUE OF THE VOLTAGE APPLIED IN ELECTROLYTIC COLORING PROCESSES OF ANODIZED ALUMINUM PT65700B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PT6570076A PT65700B (en) 1976-10-08 1976-10-08 AUTOMATIC CONTROL SYSTEM AND REGULATION OF THE AVERAGE VALUE OF THE VOLTAGE APPLIED IN ELECTROLYTIC COLORING PROCESSES OF ANODIZED ALUMINUM

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PT6570076A PT65700B (en) 1976-10-08 1976-10-08 AUTOMATIC CONTROL SYSTEM AND REGULATION OF THE AVERAGE VALUE OF THE VOLTAGE APPLIED IN ELECTROLYTIC COLORING PROCESSES OF ANODIZED ALUMINUM

Publications (2)

Publication Number Publication Date
PT65700A true PT65700A (en) 1976-11-01
PT65700B PT65700B (en) 1978-04-17

Family

ID=20081962

Family Applications (1)

Application Number Title Priority Date Filing Date
PT6570076A PT65700B (en) 1976-10-08 1976-10-08 AUTOMATIC CONTROL SYSTEM AND REGULATION OF THE AVERAGE VALUE OF THE VOLTAGE APPLIED IN ELECTROLYTIC COLORING PROCESSES OF ANODIZED ALUMINUM

Country Status (1)

Country Link
PT (1) PT65700B (en)

Also Published As

Publication number Publication date
PT65700B (en) 1978-04-17

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