Page 23 - НАЦІОНАЛЬНА АКАДЕМІЯ НАУК УКРАЇНИ

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high-strength steels, improvement of sanitary and hygienic parameters for the promotion of
environment protection.
The reaction of reetherifcation of triglycerides with triethanolamine and double
bonding amination of sunflower and rapeseed oil monoethanolamine has increased corrosion
and lubricating ability of LCLs on their basis. It was found that LCL on the basis of sunflower
(LCLs) and rapeseed oil (LCLr), compared with mineralized water, the corrosion rate of
38KhN3МFА steel is reduced by an order of magnitude, while its degree of corrosion
protection exceeds 90%. It is shown that in the new LCL the corrosion of 38KhN3МFА steel
proceeds under anode control and after mechanical treatment in them it is passivated. Post-
operation protection effect of LCL is evaluated by the appearance of chips - "indicator" after
100 hours after turning.
The mechanism of action of the proposed LCL, which consists in its chemisorption on
the steel surface after mechanical treatment, is described. The LCLs (LCLr) adhesion for
-3
38KhN3MFA steel is 63.6 ∙ 10-3 (63.9 ∙ 10 ) N/m, which is less in ~ 1.7 times in comparison
-3
with mineralized water (110.4 ∙ 10 N/m). The behavior of LCL concentrators in the contact
area of component– tool and tool – chip on the basis of derivatographic studies of their
thermal degradation was simulated. It is shown that LCLs exhibits a higher thermal
degradation resistance compared to the LCL on the basis Oil (LCLо): (during thermo-
oxidative degradation it loses weight less intensively): the loss of 50% of the LCLs mass – at
o
400 C, LCLr – 380 C, and LCLo – 340 C.
o
o
It has been established that significant corrosion protection for the LCLs use during
treatment of high- strength steels is combined with an increase in the durability of the tool
during turning of 38KhN3МFА steel in ~ 1.6 times and an increase in the speed of drilling of
12Kh18АG18Sh steel in comparison with LCLo in ~ 1.3 times. On the basis of
electrochemical and tribological research of new LCL a rational content of the concentrate in
the working liquid is 3% by weight.
The industrial test of the new LCL at the enterprise "Navigator-L" LTD confirmed its
post-operation protective effect caused by steel corrosion and the possibility of its application
in the mechanical treatment of the rotor and band steels during power unit repair.
Key words: corrosion inhibitor, anticorrosive properties, high-strength steels,
emulsions, environment-friendly lubricating and cooling liquids, mechanical treatment,
rapeseed oil, sunflower oil.