Name
Sannikov Eduard Mikhailovich
Scholastic degree
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Academic rank
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Honorary rank
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Organization, job position
Voronezh State Agrarian University
Web site url
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Articles count: 2
We have conducted experimental and analytical
studies showing the relationship of constant and pulse
forms of current sedimentation on the physicochemical
properties of chrome coatings: adhesion
strength to the substrate, residual stress, fatigue life,
elongation and contraction, yield stress, and
endurance. We have shown the methods and modes
of use of dilute electrolyte of chromium plating with
organic additives, is capable of applying a chrome
coating on parts of agricultural machines, surpassing
the properties of the coatings obtained from
electrolytes that are recommended by the GOST
standards. The proposed hardening chemical-thermal
coating technology for chromium in the manufacture
and repairing of worn parts of agricultural machinery
(rods of hydraulic cylinders, journals of crankshafts,
spools, parts, gearboxes and transmissions, etc.),
identifies the consumption of additives modifiers,
proposed methods for their determination, confirmed
by patents for inventions. The proposed technology
of worn-out surfaces of parts of agricultural
machinery of layer-block structure of the chromium
coatings with improved properties. The influence of
modifying organic additives on the structure of the
intermediate surface film of colloidal trivalent
chromium compounds, which in combination with
the parameters of the bipolar pulse current allows you
to specifically adjust the physical and mechanical
properties of crystals of the deposited chromium
layer with a grid of cracks, and without them for the
required operating conditions of dry friction or oil environments, which increases the durability of the
parts during use. The increase in yield, at the current
6-8 %, to 4 times reduces the degree of
hydrogenation of the restored details, up to 3 times
reduces internal friction, roughness, improves the
limits of strength, toughness, elongation and
contraction, increases corrosion resistance up to 3
times, obtained chromium coatings