Determination of the establishment of modern experimental physical methods of material microstructure, for the development of structural chemistry played a decisive role. X-ray diffraction structure chemical discovery and development of methods and principles quite similar to neutron diffraction, electron diffraction method, greatly enriched the people's material elements (especially molecules in the crystal) spatial arrangement of atoms in the understanding, and provided hundreds of thousands of species of reliable data crystal structure and molecular structure of the meter. Based on the elemental and simple inorganic salts (including minerals) crystal diffraction measurement Beijing isopropanol, people have come up and constantly refined the data on atomic and ionic radius. For more complex compound crystal, also measured bond lengths, bond angles, and other basic parameters of isopropyl alcohol sales by the diffraction method, also found a way diversity between atomic bonding and intermolecular forces gathered in different ways state diversity, in particular the use of X-ray diffraction method for the determination of the nearly three hundred kinds of organisms present in the molecular structure of proteins, some of which reach hundreds of thousands of proteins in the molecular weight or even hundreds of thousands of atomic mass units. Furthermore, by studying crystallography, so that people can explain these substances in crystalline state physical properties (such as optical properties and electrical properties) from the perspective of molecular and crystal structures. Eclipse principle, rely on an external current flows into the metal potential changes, thereby reducing the corrosion rate of a metal material protection technology sp500 electrochemical marking machine operation. The metal potential trend change isopropanol, electrochemical protection is divided into two types of cathodic protection and anodic protection. ① cathodic protection. By reducing the metal's potential to achieve conservation purposes, called cathodic protection. According to the source protection current, impressed current cathodic protection method and sacrificial anode. Impressed current law to provide protection current, power supply connected to the negative of the protected object by an external DC power supply, connect the positive auxiliary anode, through the electrolyte to the environment from the current loop. Sacrificial anode is to rely on the potential loss to the protected object metal (sacrificial anode) self-consumption to protect current and protect the objects directly connected to Jinan isopropanol and sacrificial anode to form a current loop to protect the environment in the electrolyte. Cathodic protection is mainly used to prevent soil, water and other neutral media metal corrosion. ② anode protection. By increasing the potential of the metal can passivation it into passive and to protect the goal, called the anode protection. Anodic protection is the use of anodic polarization current of the metal in a stable passive state, its protection system similar to the impressed current cathodic protection system, but in the opposite direction of the polarization current. Only a active - passive transition to anodic corrosion protection system technology, such as concentrated sulfuric acid tank, ammonia tanks Jinan isopropanol, Cheung dry chemical (online consultation), Jiangsu isopropanol by the Jinan Chemical Co., Ltd. to provide dry Cheung . Jinan Cheung Dry Chemical Co. (www.xiangqianhuagong.com) (www.dilunyierchun.com) Shandong Jinan, alcohols leaders, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer demand. Zaixiang dry chemical leadership with the staff warmly welcome all inquiries negotiations to create Xiang dry chemical better future.