Important Information on Safely Welding Galvanised Steel
Blog | January 10th, 2023Welding galvanised steel is an essential and valuable technology in the metal manufacturing process. This process is very useful when producing galvanised steel gratings or galvanised steel wire cloth.
However, it has developed a negative reputation over the years due to several difficulties with the welder’s health and material. However, with the correct knowledge and abilities, the welding personnel’s health will not be jeopardised. Aside from that, having a good grasp of the procedure will result in a good, welded outcome.
Here is a blog post to help you learn more about securely welding galvanised steel.
Galvanised Steel Definition
Galvanised steel is just normal steel sheets that have been zinc-coated to make them rust-resistant. A typical steel sheet is constructed of iron. However, when exposed to moisture, this substance rusts.
Galvanised steel is a popular type of steel on the market today. One of the primary reasons is its long lifespan. It has the same flexibility as steel as well. It also possesses the corrosion-resistant properties of the zinc-iron coating. Galvanised steel is also commonly utilised in modern steel frame constructions. Wind and solar industries, automobile industries, construction industries, and communications industries are among those that use galvanised steel.
Material Considerations to Consider
Welders may experience certain difficulties while welding galvanised steel. Here are a few examples.
Corrosion Problems
Corrosion resistance is a typical issue when welding galvanised steel. The purpose of galvanising is to keep steel from rusting. However, you must remove the galvanising zinc from the welding region, exposing the area to corrosion. The only method to determine this is to galvanise the steel again once the welding is finished. Although time-consuming, it is useful for maintaining the material’s corrosion-resistant characteristics.
Coating Problems
Aside from the health risks of welding galvanised steel, you may experience further challenges. One of the difficulties in welding galvanised steel is the zinc coating present on galvanised steel. This substance may jeopardise the weld. The presence of a covering makes penetration more difficult. Furthermore, it can induce inclusions and porosity in a weld.
A qualified welder is necessary to effectively weld galvanised steel. Furthermore, the zinc coating should be removed from the welding region to address the coating issue. A filler material can also be employed on the zinc-coated section of the welding region.
Proper Care and Maintenance Required
It is critical to have general care and maintenance of your items to avoid or minimise complications concerning galvanising steel. Galvanised steel products should not be subjected to pH levels ranging from 6 to 12. This is because galvanised coatings are more prone to corrosion than standard coatings.
In corrosive situations, galvanised steel goods should not come into direct touch with dissimilar metals such as brass and copper. Avoid harsh cleaning or washing of galvanised steel goods. A thin barrier coating of insoluble zinc corrosion material develops on the outside space of the galvanised steel. This is also referred to as a patina. This prevents rusting of the galvanised steel. This protective coating will be washed away by harsh washing. When this occurs, more zinc is consumed. This will shorten the life of the galvanised steel product.
Galvanised steel items placed in extremely corrosive locations, such as coastal and heavy industrial zones, should regularly be rinsed with potable water. It should also not be exposed to rain or sunlight. Make sure that galvanised items are not stored in moist or poorly ventilated regions for an extended period. The storage area should be dry and well-ventilated.
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