gold-plated  
adjective uk/ˌɡəʊldˈpleɪ.tɪd/ us/ˌɡoʊldˈpleɪ.t̬ɪd/
  (COVERED WITH GOLD)      
 镀金的
covered with a very thin layer of gold
  gold-plated earrings 镀金耳环 
 Try to obtain a good quality plug, preferably gold-plated, to replace the existing one.