Al復(fù)合材料化學(xué)鍍鎳層耐蝕性能及機(jī)理研究

1、 9 1 Liu X K. Xiang Y H, Hu W B,et al. Adhesion mechanism of direct Thin Solid Films, 2004,466(1- 2 :272 - 278 121 Niwa D, Takano N, Yamada T , et al. Nickel electroless deposition process on chemically pretreated Si(100 wafers in aqueous alkaline solurionJ. Electrochim. Acta, 2003,48(9 : 1295 - 130

2、0 1 3 Staia M H. Puchia E S, Castroa G , et al. Effect of thermal history on the microhardness of electroless Ni 1999.355-356:472-479 141 Liu X, Ban C Y. Study on electroless Xi - electroless nickel coating magnesium alloys J . J . Chin. Soc.Corros. Prot., 2002,22(4 :233 - 236 (31%. mFBR, *&B.f3$ikW

3、l+$ii!FG;:tLE J . & % l l f j f i , 2 0 0 2 . 2 2 ( 4 -:2 33 3 2 6 l o Li S H, Li B Y. Zhang J L. Study of deposition process and corro- - P J 1 . Thin Solid Fllms, sion resisting property of amorphous nickel Mater. Sci. Technol., 1 9 9 4 , 2 ( 1 :39 - 43 phosphorous J I . P alloy technology and ($a

4、%, 8 , 3 t h % . i k f 3% EE%!%ss&f3&EiE!3E corrosion resistance of coating J 1. Research on lron & Steel. 2002,128(5:35-38 (9111,9f%.ikYB NI- p $ L Z E E k k t k B t r B f % E & & B R J . N 9N 4Y ( I 3Z - 4 3 1 9 ,2 1 : 9 , I l l Jin J G. Lee S K, Kim Y H. Adhesion improvement of electroless plated

5、 Ni layer by ultrasonic agitation during zincating processJ. .#Bf,2002,128(5:35-38 CORROSION RESISTANCE OF ELECTROLESS Ni COATINGS ON SiC,/Al COMPOSITE AND MECHANISM I,I i b o, AN a o z h o n WU a o h u i , ( 1. Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150001 ; 2 . Sch

6、ool of Materials Science and Engineering, Harbin Institute of Technology, Harbin 1 5 0 0 0 1 Abstract: Ni - P coatings were prepared on SiCp/A1 composite by autocatalytic deposition and their corrosion behaviors in 3.5 % NaCl solution at 25C were studied by electrochemical impedance spectroscopy and

7、 potentiodynamic techniques. SEM, EDAX and XRD were also employed to examine the coatings so as to understand the corrosion mechanism of the coatings. T h e plating conditions show great influences on the P content of the coatings and thus the corrosion resistance. The P content of the coatings increases with decreasing the plating temperatures and pH values. The corrosion resistance of the coating can be increased significantly by increasing the P content of the coatings, which is ascribed to that the existence of P can improve significantly self passivation of t