Stainless steel plate is widely used, with good corrosion resistance, heat resistance, low temperature strength and mechanical properties; It has good hot workability such as stamping and bending, no heat treatment hardening phenomenon and fatigue performance. Without surface treatment, this index of maraging steel is close to that of other ultra-high strength steels, but maraging steel can obtain very high surface hardness and fatigue limit through simple shot peening or nitriding treatment. Compared with other ultra-high strength steels, maraging steel has excellent comprehensive welding properties, and generally will not produce welding cracks even without welding preheating and post heating.
There are dust containing other metal elements or attachments of dissimilar metal particles on the surface of stainless steel. In humid air, the condensate between the attachments and stainless steel connects them into a micro battery, which leads to electrochemical reaction and damage to the protective film, which is called electrochemical corrosion. Organic juice adheres to the surface of stainless steel and forms organic acid in the presence of water and oxygen. For a long time, the corrosion of organic acid on the metal surface will be. The surface of stainless steel contains acid, alkali and salt substances, causing local corrosion. In polluted air, sulfuric acid, nitric acid and acetic acid liquid points are formed in the presence of condensate, causing chemical corrosion. The above conditions can cause the damage of the protective film on the surface of stainless steel and lead to corrosion.

There are many kinds of aluminum plates, among which the patterned aluminum plate is a popular one. Generally, the aluminum plate will be bright and smooth only after washing. So what kind of treatment is water treatment? L the aluminum plate manufacturer will show you that from the perspective of air hole, it is mainly the circular hole in the aluminum alloy ingot. The main reason for its formation is that the gas is always in a saturated state when dissolved, and there are a large number of non-metallic inclusions in the melt, which slows down the floating speed in the process of gas casting, and the bubbles will remain in the air hole of the ingot
There are two factors causing ingot porosity: one is that the porosity produced by gas in the melt is not removed; The second is the looseness produced during contraction It is also related to the gas in the melt. Generally, we analyze it mainly according to the gas content of the melt and the casting speed
In fact, we can also use the liquid feeding method, which reduces the residence time of metal in the furnace, can make the gas in the furnace release and decompose well under the action of continuous saturation, and can also control the generation of impurities and reduce non-metallic slag inclusion
1. After alkaline etching, the liquid film of alkaline etching tank in Dalian will remain on the surface of patterned aluminum plate, which is called water washing after alkaline etching The patterned aluminum plate after alkali corrosion is difficult to clean. First, we should start from the perspective of being conducive to cleaning products. The water in the first tank should keep the temperature and alkalinity, so we don't change the water For the last two times of water washing, we can stir it properly in order to make the cleaning effect better The last two washes depend on the amount of work, and overflow treatment can be avoided
2. This is a step that must be washed at least twice, which is called neutralization w