Paint Mil Gauge | How to Achieve Valve Anticorrosion?
1. The valve corrosion form
The corrosion of metals is mainly caused by chemical corrosion and electrochemical corrosion. The corrosion of non-metallic materials is generally caused by direct chemical and physical effects.
(1) Chemical corrosion
The surrounding medium directly chemically interacts with the metal under conditions that do not generate current, causing it to be destroyed. Such as corrosion of the metal by high-temperature dry gases and non-electrolytic solutions.
(2) Electrochemical corrosion
The contact between metal and electrolyte generates electron flow, which causes itself to be destroyed in electrochemical action. This is the main form of corrosion.
Common acid and alkali salt solution corrosion, atmospheric corrosion, soil corrosion, seawater corrosion, microbial corrosion, pitting corrosion of stainless steel and crevice corrosion are all electrochemical corrosion.
2. The valve anti-corrosion measures
(1) Select corrosion-resistant materials according to corrosive media
In the actual production, the corrosion of the medium is very complicated. Even if the valve material used in a medium is the same, the concentration, temperature and pressure of the medium are different. The corrosion of the material by the medium is not the same. Each time the temperature of the medium increases by 10 ℃. The corrosion rate increases about 1 to 3 times.
For example, aluminum is very corrosive in concentrated nitric acid with a con. From the above examples, it can be seen that the correct selection of valve materials should be based on the specific situation, analyze various factors affecting corrosion.
(2) Using non-metallic materials
Non-metal corrosion resistance is excellent. As long as the valve's operating temperature and pressure meet the requirements of non-metal materials, it can not only solve the corrosion problem, but also save precious metals.
3. The valve anti-corrosion coating thickness detection
For the measurement of anti-corrosion coating thickness, it is recommended to use Linshang Technology LS223 paint mil gauge. This paint mil gauge uses the principle of eddy current and Hall effect to accurately measure the thickness of non-magnetic coatings on magnetic metals and the thickness of non-conductive coatings on non-magnetic metal substrates. LS223 paint mil gauge can be widely used in the shipbuilding industry, hardware, metal processing industry coatings and anti-corrosion coating thickness measurement. The LS223 paint mil gauge adopts the separate design of the probe and the host. Custometers can view the data while measuring in a complex environment. The instrument can accurately and non-destructively measure the coating thickness, which can be used in engineering sites and laboratories.
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