304 stainless steel to rust?

Why will rust: Under normal circumstances, stainless steel is not rust, but it definitely will not rust steel does not exist in the world, they still will rust. Often, people in order to enhance the corrosion resistance of the stainless steel plate can, will add some small amount of metal elements in the steel manufacturing process, similar to chromium, nickel and other elements. However, if and when the stainless steel plate exposed to air for a long period of time or after a long-term use later, there will be a certain amount of fine dust and fine particles of grease and the like attached to the surface of the steel sheet, so that the outer surface of the stainless steel plate to produce a certain amount of chemical change so as to form a layer of fine oxide film. If you are using is not promptly remove the oxide film, it will not only affect the appearance of the product, and would later processing procedures have some impact. Pickling rust: remove the oxide layer of the membrane surface, there are many ways, generally divided into three types of mechanical, electrochemical and chemical. In most cases, our country will be soaked with traditional steel pickling process and then, but this approach requires an immersion washing larger sink to soak stainless steel plate, stainless steel plate in some way limit the Cleaning sizes. After repeated while soaking, the metal salt will be a stainless steel plate generated in the washing tub, therefore, if needed, then washed several times, the need remains concentration and acidity of the metal salt of the acid liquid, the need for acid lotion long strictly controlled, so generally make more than one sink connected together so that they each circulation, the acid lotion to maintain liquidity, but then on the operating environment requirements will be relatively high. Solid Rust Rust: Rust has a solid when using easy to operate, easy to transport, rust fast, light pollution, many of the advantages of low cost, solid stainless steel rust remover is now very widely available in the market use A method to rust, such solid herbicides mainly erosion sulfuric acid as the main method of rust, rust accelerated combined effect of fluoride, kaolin and cleaning agents to the oxide layer made of stainless steel, use more quickly The following are its main components: H2SO4 (98%) 25 ~ 30% HF 20 ~ 25% HNO3 5% kaolin 40 to 50% nonylphenol ether 0.1% 0.5% pure methenamine 5 ~ When an appropriate amount of 10% C2H5OH powdery solid formed when needed before use 1: 1 volume of the solid powder is mixed with the water phase with stirring to use. After the end of the can with water to clean, wipe with a clean cloth or air dry. 304 stainless steel to rust www.dudusteel.com/Ask/2015/0403/5.html stainless steel Manufacturer: Wuxi champion stainless steel plate over the years has been to concentrate on developing innovative stainless steel plate, dedicated to Wuxi and domestic stainless steel Board to make a force, business has always been to staff our center, full drive the rapid development of the whole enterprise, we stick with our sincere change everyone's satisfaction. Hotline: 150-5225-7206 Fax: 0510-66608881, 0510-83631886 Address: Wuxi South stainless steel market