Methods used in galvanizing steel or iron

Galvanizing is done to protection the steel of iron from corrosion. In galvanizing process the steel is coated with zinc. The galvanizing of steel is achieved by different methods. Some of these methods are discussed below

Hot dip method

In the hot dip galvanizing, the steel or iron is dipped into the molten zinc. The surface of the galvanizing material is thoroughly cleaned before dipping. This process gives thick coating of zinc on the steel. Later this coating freezes into crystal pattern known as spangle.

However, the negative side of this process is that a thick multilayered coating is formed between steel surface and inner layer of zinc coating.  These layers can peel or flake of, when the iron or steel is bent.

Electro galvanizing method -

The second process is eletrogalvanising. Here, the immersion of the steel and iron in the electrolyte gives coating of pure zinc on the steel or iron. The electrolyte is solution of zinc sulfate or cyanide. The major benefit of this type of coating is that the thickness of the coating can be controlled accurately.

The flip side of this process of galvanizing is that the thick coating cannot be taken through this method.

Sheradizing

Sheradizing method GI Sheet Dealers in Delhi involves putting cleaned steel or iron in the enclosure, where metallic zinc dust surrounds the steel and iron.  Then the material is heated to produce the zinc alloy coating. The coating in this method confirms to the configuration of the element. But this method can be used only for small objects.

Spraying method

Spraying method is very simple method in which spray of fine molten zinc is applied on the steel or iron. The coating is then heated to produce the galvanized steel or iron. The benefit of this method is that the coating produced is very fine and does not peel or come off. And also it is less brittle. But it also have its negative points, the coating sometimes becomes porous. The pores are then filled with corrosive materials.  

Painting method

The painting method involves applying zinc dust pigment on the surface of steel or iron to galvanize them. But this method is not an effective method to produce galvanized steel. The painting can easily come off and it comes with primer, which exposes the steel completely. Also with well painted steel, it is not possible to differentiate between a zinc and galvanized steel.

The galvanized GP Sheets Suppliers in Delhi steel is used widely in homes and commercial building as window and door hoods. It is also used as roof sheets. 

Advantages and Applications of GI Sheets

GI sheets means galvanizing iron sheets. Galvanizing is a process by which iron is made rust free. In galvanizing process the zinc coating is done on the iron or steel to make it rust free. So, GI sheets are stainless steel sheets galvanized with   zinc. GI sheets also include hot dip and electro galvanized steel sheets. Besides protecting the steel from rust and corrosion, the zinc also keeps the initial strength of the steel intact for long time. The other minor function of the zinc is to give polished finish to the sheets.

GI sheets find uses in every sector of the economy. They are used in agriculture as grain silos, feeding troughs, sprayers and pans. In construction activities, GI sheets find wide use as roof sheets, walls, panels, covers, rolling shutters, highway bombers, partition walls, and painted coated products. Lots of household items are made with GI sheets. The items made with GI sheets range from small tubs and water buckets to washing machines and pipes and other fitting where water is constantly used.

It also finds use in manufacturing of electrical appliances, air conditioners, electrical panels and decorative items. Furniture items like almirah, certain chairs and sofa sets, racks are completely made with these sheets. The lockers for solid protection are solely made with GI sheets. Other uses of GI sheets are in manufacturing of railway coaches, containers for shipping companies, thermal cladding, ducting drums, sign boards, hoardings and road signs etc.

GI sheets have many advantages, which explain their wide use. The zinc coating is less expensive GI Sheet Dealers in Delhi than other coating for the steel and it has longer life in every sitting and environment. The GI sheets can also be used in coastal environment where the rate of corrosion in higher than other weather areas. The maintenance is low and almost cost nothing over the long period.  The GI coating has unique metallurgical structure and gives protection against any abrasion, or mechanical damage that may occur during transportation, erection and service .Galvanized coating provides automatic protection to the any damaged area of the sheet. In other coatings, the damaged areas needs patch up but that is not the case with GI sheets.

Galvanizing the sheets gives them cathode or sacrificial protection to any small area damaged during transportation. Thus the entire length of the sheets is protected by the coating. The method of inspection of seeing the galvanizing of steel is very easy. It can be seen by naked eyes. It can also be tested by simple non destructive thickness method. The process of galvanizing is not depended on any weather condition.  The life of galvanizing coating and protection quality MS Angle Dealers in Delhi is reliable and can be predictable. The galvanizing is done as per standards and only minimum coating is applied. And finally, the look of galvanized stain less steel gets aesthetic appearance.

Types of roofing sheets used in India and their benefits

Without a proper roofing system a house cannot be called complete. Numbers of sheets are used as roofing system, depending on the nature of the house, cost estimation and need of the customer.  

PPGI and PPGL are widely used in constructions of houses. Pre-painted galvanized steel sheets and pre painted galvalume steel sheets alu zinc alloy coated sheets provide the strength of steel with corrosion resistance quality of zinc or zinc alunimium coating. These sheets can be pressed, punched, roll formed and joined easily into decorative and structural products. These sheets have number of benefits, which have made their use wide spread.

They have thermal properties to maintain balance between changing weather. Their secure fastening system ensures the proper security to the house during extreme weather conditions. These sheets are also given high durable paint finish. Aluminum sheets are lighter than steel and are used in residential roof sheeting. Aluminums sheets are very soft, unlike steel they are liable to dent but they don’t rust. Like steel sheets, aluminums sheets are also painted and coasted.  

Sandwich puff panels comprise of two facings of sheets of steel or aluminum of high strength, enclosing a core, which is thick and light with stiffness.The sandwich panels are the affordable option for roofing, wall cladding and cold room walling.These sheets can withstand heavy load and at the same time they provide excellent thermal insulation.Their installation is easy and maintenance costs are low.

Polycarbonate sheets are widely used for non corrosion industrial structural roofing and siding. These sheets provide high strength and insulation properties. These sheets find use in covering swimming pools, display and sign boards, sky lighting and covered walkways, industrial roofing and glazing. The advantages of these sheets are resistance to fire, UV, protection from all type of weather. The sheets are easy to install and have low maintenance cost.

PVC roofing sheets are used widely for their excellent qualities such as fire resistance, UV protection, lightness and easy to install procedures. These sheets also are rust and termite proof with high impermeability. These sheets are transparent, that is why there installation creates soothing atmospheres by allowing natural light to come. Mostly these sheets are used for car shed covering places, warehouses, sports , multi purposes halls and roof terrace.

Fiberglass roof sheets Colour Coated Roofing Sheets in Delhi

provide natural light with roof cover. They allow natural light of sun to filter the sheet but protect the place from other weather conditions .these sheets can be installed with ease and come in various decorative colors.

Copper metal roofing and alloy roofing GI Sheet Dealers in Delhi

products are high end roofing systems. Copper metal sheets are very soft and can be created in any design or pattern but they are very expensive. Alloy products for roofing have strength, durability and rust resistance qualities but they can be expensive for average household.