The process of making corrosion signs by sign manufacturers is roughly divided into three types: concave signs, convex signs, and convex and concave combined signs. Basic requirements for corrosion signs made by sign manufacturers: beautiful patterns, clear lines, suitable depth, flat bottom surface, full color, uniform drawing, and uniform surface color. The characteristics of the corrosion signs: weather resistance, solvent resistance, even if the paint is peeled off, it still has the function of a nameplate.

Stainless steel is a special material, it has good resistance to atmospheric and fresh water media corrosion, and can be obtained by wire drawing, corrosion, and polishing after a good decorative effect. However, the corrosion of stainless steel signs is much more difficult than that of copper and aluminum plates. The fastest corrosion method is electrochemical corrosion, also called electrolytic corrosion. Because electrochemical corrosion causes ink to fall off during sign corrosion, signs produced by sign manufacturers are not suitable for electrochemical corrosion, especially fine patterns. We only choose chemical corrosion, and chemical corrosion can be roughly divided into two types: strong acid corrosion and ferric chloride corrosion. The strong acid corrosion formula is complicated, difficult to maintain, and generates a large amount of smoke, which pollutes the air and is harmful to the human body. Sign manufacturers without purification equipment cannot use it. The ferric chloride corrosion formula is simple and easy to maintain and regenerate.