(a) What is meant by electroplating? What is the purpose of electroplating?
(b) Which properties of chromium metal make it suitable for electroplating it on car bumpers, bath taps and bicycle handlebars, etc., made of iron?
(a) What is meant by electroplating? What is the purpose of electroplating?
(b) Which properties of chromium metal make it suitable for electroplating it on car bumpers, bath taps and bicycle handlebars, etc., made of iron?
(a) Electroplating is a process that uses an electric current to reduce dissolved metal cations so that they form a thin coherent metal coating on an electrode.
Electroplating is widely used in various industries for coating metal objects with a thin layer of a different metal. The layer of metal deposited has some desired property, which the metal of the object lacks. For example, chromium plating is done on many objects such as car parts, bath taps, kitchen gas burners, wheel rims and many others for the fact that chromium is very corrosion-resistant, and thus prolongs the life of the parts. It is also used in making expensive jewellery. Points to remember are:
i) The metal object on which the electroplating is to be done should be a negative electrode. Therefore it is connected to the negative terminal of the battery.
ii)The metal which should be deposited should be a positive electrode.
iii)The water-soluble salt of the"metal to be deposited" is taken as the electrolyte.
(b) Chromium metal has a bright appearance and it does now not corrode. Chromium metal is quite pricey and therefore it's not economical to make the whole object out of chromium. So the thing is made from a cheaper steel and only a thin coating of chromium metallic is deposited all over its surface by way of electroplating. After chromium plating, it appears as if the whole iron or metal object is made of chromium steel. Chromium plating is completed on many objects made of iron metal such as a bicycle, handle-bars, bicycle bell, wheel rims, lavatory fittings, LPG stoves, motorcycle constituents, and plenty of, many other objects.
A skinny coating of chromium metal on iron and metal objects make the Iron and metal objects seem bright and appealing, as well as protects them from corrosion or rusting.
(a) Electroplating is a process that uses an electric current to reduce dissolved metal cations so that they form a thin coherent metal coating on an electrode.
Electroplating is widely used in various industries for coating metal objects with a thin layer of a different metal. The layer of metal deposited has some desired property, which the metal of the object lacks. For example, chromium plating is done on many objects such as car parts, bath taps, kitchen gas burners, wheel rims and many others for the fact that chromium is very corrosion-resistant, and thus prolongs the life of the parts. It is also used in making expensive jewellery. Points to remember are:
i) The metal object on which the electroplating is to be done should be a negative electrode. Therefore it is connected to the negative terminal of the battery.
ii)The metal which should be deposited should be a positive electrode.
iii)The water-soluble salt of the"metal to be deposited" is taken as the electrolyte.
(b) Chromium metal has a bright appearance and it does now not corrode. Chromium metal is quite pricey and therefore it's not economical to make the whole object out of chromium. So the thing is made from a cheaper steel and only a thin coating of chromium metallic is deposited all over its surface by way of electroplating. After chromium plating, it appears as if the whole iron or metal object is made of chromium steel. Chromium plating is completed on many objects made of iron metal such as a bicycle, handle-bars, bicycle bell, wheel rims, lavatory fittings, LPG stoves, motorcycle constituents, and plenty of, many other objects.
A skinny coating of chromium metal on iron and metal objects make the Iron and metal objects seem bright and appealing, as well as protects them from corrosion or rusting.
