This product is mainly composed of a variety of active agent, corrosion inhibitor and complexing agent, which can quickly and thoroughly remove the corrosion of the incisions of galvanized sheet. The rust removing force is mild, no damage to the galvanized layer, no discoloration, complete dissolution, no residue, low foam, easy to rinse, green environmental protection, innoxious and harmless. A month later, the biodegradation rate was 100%.