Pure molybdenum coating cannot be electrodeposited  from  aqueos  solutions it readly codeposits with iron, cobalt, nickel, forming an alloy. Alloy  electrodeposition  widly employed in the production  of new materials with   specific mechanical, chemical and phisical properties.  The indused codeposition molybdenum  with  cobalt to obtain metalic coatings with useful  properties, such as hardness, catalytic and magnetic properties [1]. Here were  examined  corrosion   resistence  Co-Mo and Co-Mo-P alloys electrodeposited   from solutions :    1.100 g/l CoSO4 ·7H2O, 20 g/l Na ₂MoO₄· 2H₂ O, 35 g/l H ₃C ₆ H ₅O₇ , 35 g/l Na₂E DTA,  pH = 4, t  =20^o C. 2. 0, 6 mol /l CoSO4·7H2O, 0,3 mol / l H3C6H5O7·H2O, 0,02 mol. / l Na2MoO4 ·2H2O, 0,1mol /l NH4H2PO2 ·H2O, pH = 6, t =20 C.  The deposition occurred in the range of curent densities 2 –10 A/dm².  Corrosion properties of  Co-Mo and Co-Mo-P alloys in neutral media  with cloride-iones (7 g/l Na₂SO₄ and 7 g/l NaCl) were  studied  by methods of electrochemical impedance spetroscopy and voltammetry using sistem AUTOLAB (GPSTAT 20 +FRA ) with program GPES  4,9 and FRA 4,9. Corrosion parameters  was found from analysis voltammetric curves and spectrums of electrochemical impedance. Morfology and alloys composition were studied by scanning electron microscope (TESCAN) with system for local chemical analysis (ICA Energy EDX).The structure of electrodeposits were studied by X –ray phase analysis with aplication of diffractometer (ДРОН –3) by Ø/2Ø method.  It was shown that curent density increases   from 2 to 10 A/dm2, content  of  molybdenum  in Co- Mo and Co -Mo –P alloys increase, but content of P decrease. The content of Mo in Co-Mo alloys are 6,9 – 12 at. % and in Co-Mo-P alloys – 3 –7,5 at. % and  at. % of P = 3,3 – 1,9.  Results of  X-ray diffractometry are shown the increase of texturing coatings obtained at curent density 5 – 10A/dm2 and it is very important  for corrosion characteristics of  Co-Mo and Co-Mo-P alloys.  It has been found to depend corrosion resistance of  testing simples from composition and structure. Corosion parameters of Co-Mo electrodeposited at 2  - 10 A/dm2 : Icor. = 2,6 – 20.2 ·10-5 A, Ecor. = -0,653 –0,786 V, Rcor. = 0,5 –1,12·103 Om, Vcor. - =5,4 - 24·10-5 mm/year and of   Co-Mo-P alloys  ellectrodeposited at 5 – 15 A/dm2:  Icor. =1,2 – 15,6·10-5A,  Ecor. = –0,674 – 0,779 V, Rcor. =  3,7 –1,58·103 Om, Vcor. ~ =5·10-5 mm/year.  It is shown that induced electrodeposition molybdenum  with cobalt is one method to achive materials with high corrosion resistence.