Effect of salt solution concentration on salt spray test
In the above, we talked about the salt spray test on integrated circuits. It is concluded that the corrosion is the largest when the salt solution is between 3%. So what knowledge can we learn from this test? The editor will explain to you: It can be seen from the figure that as the salt concentration increases, the corrosion rate begins to be proportional to the concentration, but when the concentration exceeds 3%, the relationship between the corrosion rate and the concentration is inversely proportional, that is, the reaction rate decreases as the salt concentration increases. . The solubility of oxygen is inversely proportional to the concentration. This is because at a certain temperature, the corrosion rate is controlled by two main factors, the salt concentration and the oxygen content dissolved in the solution. When the oxygen content in the solution can satisfy the electrochemical reaction, the corrosion rate is controlled by the salt concentration, that is, the larger the Cl ion concentration, the stronger the reaction occurs. When the concentration exceeds 3%, as the concentration increases, the dissolved oxygen content decreases, which cannot meet the needs of the electrochemical reaction. At this time, the corrosion rate is controlled by the oxygen content in the solution. although The concentration of Cl ions becomes large, but at this time, the main function is oxygen, so the corrosion rate becomes smaller as the concentration increases. Automatic Pet Feeder,Automatic Feeder,Timed Cat Feeder,Auto Cat Feeder Green Source(Guangzhou) Co. Ltd. , https://www.stargalaxycn.com