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Safety protection of waterproof scale
2023-03-09
The waterproof scale protective layer method covers the waterproof scale surface with a protective layer to isolate the waterproof scale product from the surrounding corrosive medium, thus avoiding corrosion.
For example:
1. Coat the surface of steel products with automobile oil, glycerin, paint or cover the corrosion resistant non-waterproof scale raw materials such as ceramic and plastic.
2. The steel surface is inlaid with a waterproof scale that is not easy to be corroded, such as zinc, tin, chromium, nickel, etc. This waterproof scale often produces a layer of tight metal oxide plastic film due to oxidation, thus preventing water and gas from corroding steel.
3. Use chemical methods to transform the steel surface into a fine and stable air oxide film. For example, a layer of fine gray and black ferric oxide plastic film is produced on the surface of equipment parts, guns and other steel products. Photo-catalytic protection method uses the principle of primary cell to carry out the maintenance of waterproof scale and try to eliminate the primary cell reaction that leads to thermoelectric corrosion. Photo-catalytic protection methods can be divided into anode protection and pipeline cathodic protection.
Cathodic protection method is widely used in waterproof platform scale. [Solve the corrosive substances] Remove the corrosive substances, such as often wiping the waterproof scales, placing moisture-proof agent in the instruments and meters, and adding a small amount of desulfurizer in the corrosive substances that can slow down the corrosion rate. Photo-catalytic maintenance uses the maintained waterproof scale as the negative pole of the corrosive rechargeable battery to prevent it from corrosion, so it is also called cathodic protection method. There are two specific methods: cathodic protection guarantee method. This method is to connect Kailang waterproof scale (such as zinc or aluminum alloy of zinc) to the waterproof scale to be maintained. When thermoelectric corrosion occurs, this Kailang waterproof scale will undergo oxidation-reduction reaction as a negative stage, so as to reduce or avoid the corrosion of the waterproof scale to be maintained. This method is often used to maintain the steel pile in the water and the hull of the cargo ship, such as the maintenance of the steel hydraulic gate in the water. Generally, a number of zinc blocks are welded below the runner of the hull of the cargo ship or on the rudder close to the propeller to avoid the corrosion of the hull. In addition, the AC protection method connects the waterproof scale to the cathode of the switching power supply, and selects a piece of plastic raw material with conductivity to plug the positive wire. After being plugged in, the negative electricity (electronic devices) will gather on the surface of the waterproof scale, thus preventing the loss of electronic devices of the waterproof scale and realizing the purpose of protection. This method is mainly used to avoid the corrosion of waterproof scale machinery and equipment in soil layer, sea surface and river. Another method of photocatalysis maintenance is called anode protection method, which is the whole process of passivation treatment of anodic oxidation within a certain potential range according to the additional working voltage. It can reasonably prevent or avoid the corrosion of waterproof scale machine equipment in acid, alkali and acid salt.
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