SU1239175A1 - Method of producing bipolar titanium-lead electrode - Google Patents

Description

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This invention relates to technical electrochemistry, in particular to electrode materials for zinc electrodeposition.

The purpose of the acquisition is to reduce the power consumption by reducing the ohmic resistance of the transition titanium lead layer.

Example. Lead surfacing; electrodes with a diameter of 15-16 mm for samples of titanium with a size of 118x48x3 mm are made by electric arc welding method

Lead surfacing on the surface of the titanium matrix is carried out by moving the lead electrode relative to the titanium matrix or by moving the titanium matrix relative to the electrode, ensuring stabilization of the arc film on titanium to form a titanium-lead alloy and subsequent lead build-up by maintaining a given gap between the lead electrode and the surface of the titanium matrix, which allows to obtain a directional layer in the form of a continuous tape, the thickness and width of which is determined by the size E lead electrode and the welding conditions (movement speed of the lead electrode and the parameters of the electric current).

A direct current voltage is applied to the lead electrode relative to the titanium plate from a VD-502 type rectifier with a working voltage of 40-50 V and a welding current of 200-300 A. The welding is carried out continuously

Editor N. Yatsola Order 3356/22

Compiled by T, Usova Tehred M. Khodanych

Corrector

Circulation 615 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Rauigska nab, d, 4/5

Production and Printing Enterprise, Uzhgorod, ul. Project, 4

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with obtaining lead strips 8-12 mm wide and 3-4 mm thick. By passing the lead electrode several times, the titanium sample surface is covered and the bipolar electrode is rolled at a pressure of 20 kg / cm.

In order to avoid deformation of the titanium sample during the deposition, the back side of the sample is cooled with running water. Welding is carried out both in an air environment and in an inert gas environment, which improves the quality of the coating and reduces lead spatter.

The ohmic resistance of the transitional titanium-lead layer in the samples of electrodes made by the proposed method is 0.7-1.6 by 1 SGOm 170-175 10 Ohm in a known manner. The lead test of the lead coating from the surface of the titanium matrix shows that the tensile strength is 1.2-1.7 kgf / mm.

The deposition of lead on titanium with alternating current gives the coating quality the worst, compared with the deposition on direct current, while the tensile strength of lead from titanium is 0.4-0.6 kgf / mm and transient resistance 0.8-1. 2i10 ohms. Lead-to-titanium surfacing at a constant current and positive polarity on the lead electrode practically does not occur, the tensile strength is less than 0.2 kgf / mm. The deposition of lead on titanium does not occur even with the exception of the cooling of the untreated surface of the titanium sheet.

Proofreader V. But ha

Claims (2)

1. METHOD FOR PRODUCING A BIPOLAR TITANIUM-LEAD ELECTRODE, including applying lead to a titanium sheet, characterized in that, in order to reduce the electric power consumption by reducing the ohmic resistance of the transition titanium-lead layer, lead is applied to one side of the titanium sheet by electric arc welding at direct current with a negative polarity of the lead electrode, and the other side of the titanium sheet is simultaneously cooled to room temperature. 2. The method according to p. 1, characterized in that after applying a layer of lead, the electrode is rolled through rolls with an adjustable gap between them. K) 00 s © • m C 1 1239