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               with new surface after machining in LCL are presented.

                     Gravimetric studies has shown that in 3% LCL based on sunflower (LCLs) and

               rapeseed  (LCLr)  oils  in  comparison  with  mineralized  water,  the  corrosion  rate  of

               38KhN3МFА  steel  with  polished  surface  reduces  by  an  order  of  magnitude  and  the

               degree  of  corrosion  protection  exceeds  90%.  Enlargement  of  LCLs  and  LCLr

               concentrations from 1% to 3% increases the protection effectiveness but further increase

               of concentration up to 5% practically does not affect the corrosion process.

                     Electrochemical  studies  of  polished  steel  samples  and  newly  formed  specimens

               surface were performed to determine the LCL ability to  protect against corrosion the

               surface  of  machined  parts.  Newly  formed  surface  is  a  result  of  machining  in  the

               corresponding LCL. It was found that after machining in the investigated environments

               the  repassivation  (increase  of  potential  from  -331  ...  -340  up  to  30  ...  40  mV)  for

               12Kh18АG18Sh steel was observed, and for 38KhN3МFА steel in water the potential

               falls  by  30%  while  in  LCLs,  LCLr  and  LCLo  increases  by  33%,  17%  and  7%

                     The character of corrosion potentials and currents changes of 12Kh18АG18Sh and

               38KhN3МFА  samples  with  mechanically  treated  surfaces  in  the  environments  of  the
               investigated LCL is similar to corrosion potentials and currents changes of samples with

               polished surface. However, after machining the samples surface in LCL, the corrosion
               currents  of  both  steels  in  the  environment  with  3%  LCL  is  by  order  larger  than  the

               corrosion currents of the polished samples. Such an increase in currents is associated
               with an increase in the surface area of samples.

                     The addition of 1% LCLs to water reduces the corrosion current of 38KhN3МFА

               steel by 3,9 times, and the addition of 3% LCLs by 4,4 times in comparison with water

               and increases the Taffel constants, which testifies to high corrosion protection of new

               developed LCL.

                     The postoperative protective LCL effect is evaluated according to the appearance

               of the shavings (the "indicator") after 100 h after sharpening. This effect confirms the

               protective action of LCL. The effect of the LCL aftereffect due to the adsorption of their

               components is confirmed by the results of the LCL surface tension investigations and
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