METHOD FOR APPLICATION OF METAL COATING ON CURRENT-TRANSMITTING SURFACES OF CONTACT JOINTS Russian patent published in 2019 - IPC C23C26/02 C22C28/00 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, in particular to the field of mounting, repair and maintenance of electrical equipment. Method of applying a protective coating of a low-melting alloy based on indium on the current-transmitting surfaces of the contact parts of the contact connections includes cleaning from contamination, degreasing of current-transmitting surfaces, applying flux, removing residual flux, carrying out heating of a low-melting alloy based on indium, a tool for applying the above-mentioned coating and contact parts and applying to the current-transmitting surfaces of contact parts of a low-melting alloy based on indium. For the implementation of the proposed method using an alloy based on indium with a melting point of 72 °C, having a composition, wt. %: indium – 66.3, bismuth – 33.7.

EFFECT: improved reliability and energy efficiency characteristics of contact connections are provided.

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