Galvanized coating is a process of coating a protective layer of zinc over steel and iron objects. The process of galvanization provides a layer of protection to these metals, preventing them from corroding and developing rust in the presence of water and other elements. Galvanization is an immensely important process in the modern world, as it enhances objects that are to be used in industries and public works.
Galvanization is done with help of hot dip galvanizing, electrogalvanized coating, and mechanical galvanization. Hot dip galvanization is a process of dipping already fabricated steel into a vat of molten zinc. This provides a reliable and substantial coating to the steel and is a relatively simple process. Galvanized steel objects can be easily identified due to the yellowish coating.
In electrogalvanizing process a thin layer of zinc is applied to the steel with the help of electrolysis. The steel part is connected to a negative terminal of the electrical circuit, and zinc anodes to a positive terminal. The process involves an electrolytic solution through which a current is passed. As a result, electrochemical reactions occur, and a thin layer of zinc is deposited on the steel. This process is usually used to coat small objects such as nuts, bolts, and screws.
The galvanization process provides numerous benefits to the metals. Firstly, it increases the life of the metal by protecting the surface from corrosive elements. Secondly, it enhances the beauty of the metal object by giving it a shiny and glossy look. Thirdly, the process helps in preventing any harmful chemicals and pollutants such as sulfur and nitric acid from seeping into the metal. Lastly, the process increases the resale value of an object.
Galvanized coating is broadly employed in various industries. It is used in making architecture and infrastructure, automobiles, defense, electrical, oil & gas industry, ships, and aircrafts. Galvanization is used in the production of complex engineering components such as fuel tanks, electrical components, and pipes. It is also used in the production of household items such as nails, utensils, appliances, and lighting fixtures.
The price of galvanized steel depends upon its quality and size. The larger the object’s size, the more expensive the galvanization process. The cost of the galvanized steel also decreases with the decrease in its quality. Galvanization provides several benefits to the steel and other metals, making it a much more preferred alternative to plain steel. As a result, galvanization is one of the most widely used processes in various industries.
