The safety grills, be it for windows, balcony or grills, shall always be treated with anti-rust solution. Anti-rusting refers to the protection of metal surfaces from corroding.
Metals have a tendency to have chemical reactions with air and water when exposed to harsh environmental conditions, causing the metal to rust or corrode. For example, if iron is exposed to corrosive atmosphere for an extended period, the iron will start rusting due to oxygen interaction with water on the iron’s surface. Therefore it’s very essential to treat metals with anti-rust solution especially those exposed to environment.
More on Anti-Rust Solution
There are two types or you can say solutions of anti-rust used for different purposes, but for Safety grills only. (i) Red oxide and (ii) Yellow oxide anti-rust solution. These serve as similar purpose to interior wall primers where it prepares your metal for a topcoat, but it also gives iron and steel surfaces a layer of protection.
Yellow oxide anti rust solution is of higher quality. It is usually used for sea facing residences and offices. Sea being nearer, the grills and architectural structures too will corrode easily. To protect against corrosion.
Once the grills are treated with anti-rust solution, on drying they are either painted of powder coated as desired color.