5234235
Descrição
FlashCards por Franzi Ska, atualizado more than 1 year ago
|
Criado por Franzi Ska
mais de 8 anos atrás
|
|
| Questão | Responda |
| non ferrous metals | metals that do not contain iron |
| aluminium | -widely used, often in alloy form -duralium: alloy (used in aircraft manufacturing) which also contains copper and magnesium -al can also be alloyed with titanium to produce very stron, lightweight metals |
| copper | -excellent electrical conductor ->use in electric wires -good ductility -> suitable for pipes -widely used in alloys: ->brass(messing) (copper and zinc) ->bronze (copper and tin, sometimes lead(blei)) |
| silver | -PRECIOUS METAL ->reference to its high cost -best electrical conductor |
| gold | electrical conductor corrosion resistant |
| plating | covering with a thin layer of metal to protect steel from corrosin example: galvanizing (zinc plating) |
| hot-dip galvanize | placing metal in molten zinc |
| electro-galvanize | -type of electroplating -steel component is placed in a liquid (electrolyte) -connected do the negative terminal (to become the cathode) -piece of zinc is also placed in the electrolyte+connected to the positive terminald (anode) of the supply. -an electric current then flows between the pieces of metal, through the electrolyte. this causes a chemical reaction, which deposits zinc on the cathode, plating the component. |
| anodizing | related process -to protect aluminium -component to be anodized is connectet to the positive terminal+placed in electrolyte, whith a cathode. as electricity flows, aluminium oxide is deposited on the anode. as this is harder than aluminium metal, it provides protection |
Quer criar seus próprios Flashcards gratuitos com GoConqr? Saiba mais.