Question

Aluminium bronze is made up of:
A. $Al,Cu,Mn$
B. $Fe,Al,Ni$
C. $Al,Cu,Ni$
D. $Al,Cu$

Answer 1

Hint: To figure out the components required to prepare aluminium bronze, think about the name of the alloy and also consider the components of bronze before answering this question.

Complete answer:
Aluminium bronze, as the name suggests contains about 4-15% of aluminium and is defined as strong and corrosion resistance. It is resistant to tarnishing and is even used to make jewellery due to its golden colour. It also has strength that can be compared to that of mild steel and is used in machinery like paper making machines, non-sparking tools, and non-magnetic chains and anchors. Its resistance to oxidation at high temperatures as well as corrosion enables it to be used in services involving exposure to dilute sulphuric acid, hydrofluoric acid and other such acids.
Now, let us look at the components of bronze. Bronze usually contains copper and tin, but in aluminium bronze, the tin is replaced by aluminium. Many other elements like nickel and iron are also present in trace amounts to reinforce certain characteristics of the alloy. An example of this is, aluminium bronze containing nickel. This alloy is considered to be the strongest and has been used to make turbine compression blades. The alloy that has about 8% of aluminium can be rolled into sheets or drawn into tubes without undergoing any heating process beforehand. Many alloys of aluminium bronze also contain iron as manganese, they are not that malleable or ductile without heating but they can be after heating.
So, aluminium bronze mainly consists of the elements aluminium and copper.

Hence, the correct answer to this question is ‘D. $Al,Cu$’.

Note:
Remember that although some alloys of aluminium bronze do contain the metals iron, nickel, and manganese; but they are usually added to reinforce certain properties of the original aluminium bronze. The base materials used in all alloys of aluminium bronze are aluminium and copper.