Anticorrosive equipment The main function is to prevent corrosion, to achieve the purpose of long-term use of equipment. But because of their own manufacturing materials and complex use of the environment, which also allows corrosion equipment can not avoid the risk of corrosion, so we need to understand some of the reasons for corrosion of corrosion equipment in order to better understand the anti-corrosion equipment anti-corrosion treatment.
Corrosion of corrosion equipment, in general, mainly because of Electrochemical Device corrosion of metal. And the Electrochemical Device Device of the electrolyte solution is known as Electrochemical Device corrosion. In the natural environment and the production of metal corrosion occurs, the vast majority are Electrochemical Device corrosion. Such as cast iron, carbon steel, all kinds of stainless steel, low alloy steel, copper, aluminum, lead and its alloys are often used in the metal, in a variety of alkali, acid, salt solution; atmosphere, soil; industrial water, In the corrosion are Electrochemical Device corrosion, and metal intergranular corrosion, pitting corrosion, stress corrosion cracking and other parts of the corrosion is the special form of Electrochemical Device corrosion. Anticorrosive equipment is to Electrochemical Device corrosion and corrosion.
Since you know the corrosion of corrosion equipment, then how to deal with? Anticorrosion equipment to reduce corrosion? The following methods can be used to reduce corrosion:
1, will be anti-corrosion equipment, corrosive substances in the environment to remove other harmful ingredients to remove, so as not to produce corrosive acid gases. For example: the water removed - to prevent the indoor atmospheric corrosion, removal of dissolved oxygen in the water - the prevention of neutral water caused by carbon steel corrosion.
2, add preservatives, add preservatives to reduce anti-corrosion equipment corrosion mainly by adding neutralizer method to adjust the ph value. In the corrosive environment to add a small amount of corrosion inhibitor, so that the metal surface to form a protective film, which can significantly reduce the rate of corrosion of metal. Can get a certain anti-corrosion effect. Such as stainless steel, titanium and other hydrochloric acid, sulfuric acid and the like non-oxidizing acid corrosion resistance is relatively poor, you can add oxygen and nitric acid and other small amount of oxidants to reduce the possibility of corrosion of corrosion equipment and so on.
Anti-corrosion equipment for everyone's work to facilitate, we also need to protect the anti-corrosion equipment to prevent corrosion of Electrochemical Device corrosion equipment, we understand the above knowledge, I believe the hearts of a solution. In addition, Rui can remind you to buy anti-corrosion equipment, attention to equipment quality, reduce the risk of corrosion equipment.
Electrochemical Device knowledge of the examination, often involving the ion flow and electronic flow problems, such problems are relatively simple, most students use rote way can also get points; but there are many students mixed, the fundamental reason is: There is no good understanding of the formation of current.
We divided the two batteries and electrolytic cell in two parts for analysis
1. For the original battery, we must understand: the external circuit (ie, the wire), the formation of current is the result of electronic flow, the internal circuit (ie, electrolyte solution), the formation of current is the result of ion flow.
In the external circuit, the current flows from the positive pole to the negative pole. Therefore, the flow direction of the electrons is from negative to positive (because the electrons are negatively charged, and the direction of the current is opposite to the current). That is, we say that the negative electrons flow out, Inflow.
In the internal circuit, the current flows from the negative pole to the positive electrode. Therefore, the cation flows from the negative electrode to the positive electrode (the cation is positively charged and the current direction). The anion flows from the positive electrode to the negative electrode (the anode is negatively charged and its current is opposite to the current).
2. For an electrolytic cell, the current flows from the positive side of the power supply to the negative of the power supply.
The positive pole of the power supply is connected with the anode, the negative pole of the power supply is connected with the cathode, the direction of the current in the wire is: one end is the positive pole of the power supply to the anode and the other end is: the cathode flows to the negative pole of the power supply. As the electrons are negatively charged, their flow in the wire is just the opposite: the electrons flow from the negative supply of the power supply to the cathode and from the anode to the positive supply.
In the electrolytic cell, the electrolyte solution also belongs to a part of the external circuit of the power supply. The current direction is from the anode connected with the positive pole of the power supply to the cathode connected with the negative pole of the power supply. Therefore, the flow of the cation also flows from the anode to the cathode, Charge, which flows in the opposite direction to the current, from the cathode to the anode.