Introducing foreign advanced technology and considering real production condition, our company has successfully developed Xinyue Brand multi-function corrosion inhibition and fog depression agent. After corrosion inhibition and fog depression agent is added into pickling liquor, it can effectively inhibit acid fog, avoid overpickling, provide reliable guarantee to product quality and improve production and work environment. In the many similar products at home, the agent has many characteristics such as strong practicability, excellent performance and low price, and so is a high and new tech product to favor environm- ent protection, avoid the corrosion of workpiece body, decrease acid consumption especially and raise ec- onomic benefits. At the same time, it is a perfect additive for iron and steel processing enterprises.