105results about How to "Improve surface corrosion resistance" patented technology

The invention relates to a method of machining a special passivated stainless steel surface. The method includes a first step of cold rolling raw materials, rolling by adopting roller with 2.0 micrometers to 3.0 micrometers of roughness Ra, controlling cold rolling reduction rate within 5% to 10%, controlling rolling lubrication oil amount within 2000 liters per minute to 4000 liters per minute, a second step of passivating cold rolled materials, conducting annealing and pickling on cold rolled surfaces, controlling furnace temperature of an annealing furnace within 350 DEG C to 550 DEG C, controlling ratio of acid liquid in an acid groove to be 10 grams per liter to 25 grams per liter of hydrofluoric acid (HF) to 80 grams per liter to 200 gram per liter of hydrogen nitrate (HNO3), controlling pickling passivation temperature within 40 DEG C to 60 DEG C, and controlling running speed within 25 meters per minute to 40 meters per minute. Due to the facts that machining is conducted with the help of devices in a stainless steel enterprise and similar products are produced without need of additionally configuring a surface coating production line, production cost is greatly saved. Due to the fact that production technology process is relatively simple and controllable, production efficiency is high. Due to the fact that corrosion resistance of the surfaces which are pickled and passivated is greatly improved, stability is good.