《表面工程技术与缓蚀剂》2014年春学期在线作业(一)（Surface engineering technology and corrosion inhibitors online homework in spring 2014 (1)）.doc

《表面工程技术与缓蚀剂》2014年春学期在线作业(一)（Surface engineering technology and corrosion inhibitors online homework in spring 2014 (1)） Surface engineering technology and corrosion inhibitors online homework in spring 2014 (1) First, radio questions (10 questions, 30 points) 1. for thermal spraying, the correct expression is () A. heat source fuel must be gas fuel B. the powder to be sprayed may be either metallic or nonmetallic The C. powder is first heated to full molten state D. the smoother the sprayed surface, the better 2., compared with electroplating, the electroless plating is not correct A. coating is uniform B. requires no electrolysis equipment and accessories C. can be chemically plated on metals, nonmetals, and semiconductors D. is not affected by uneven distribution of power lines E. plating solution has good stability 3. one of the necessary conditions for electroplating is that there is an applied current, and one of the other necessary conditions is () A. plated substrate must be metal material as a whole B. was carried out in an electrolyte solution C. high temperature D. was carried out under vacuum 4. the salts of the deposited metals deposited on the cathode in electroplating are as follows A. main salt B. additional salt C. buffer D. anode activator E. additive 5., the difference between brush plating and other plating is the biggest characteristic The A. coating is dipped on the brush by the brush B. is not subject to part shape restrictions C. keeps relative movement speed D. brushes are large, small, and of different shapes, adapted to different parts of the surface 6. surface engineering techniques can be divided into four groups according to the characteristics of the surface layer deposition process: atomic deposition, particle deposition, overall coverage, and () A. surface treatment B. surface processing Surface modification of C. D. surface coating 7. surface engineering technology in structural materials and engineering components and mechanical par