METHOD OF CONNECTION OF STEEL PARTS Russian patent published in 2007 - IPC B23K9/23 B23K9/16 B23K28/02 B23K31/02 B23K103/04 

FIELD: mechanical engineering; welding.

SUBSTANCE: invention relates to method of welding of steel parts with subsequent protection of weld seams and near-seam zones from intensive corrosion. Method includes machining of edges of steel parts to be welded to prepare them for welding, assembling for welding, welding of edges of steel parts and application of protective coating on zone of welding. Steel parts are connected by argon-arc welding. Coating is applied after welding by plasma spraying onto weld seam and zone of its thermal influence after cooling of welding zone lower than weld seam melting temperature. Plasma spraying is done with material same as that of connected parts.

EFFECT: improved reliability of protection of welding zone from local corrosion owing to equalizing chemical potentials, exclusion of formation of anode and cathode sections, simplified creation of protective coating.

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