In practical production applications, electromagnetic valves face a variety of media types, and even for the same medium, the corrosion rate of materials varies under different pressures, temperatures, and concentrations. For example, aluminum is highly corrosive in concentrated nitric acid with a concentration of over 80%, but corrosion is not severe in medium to low concentrations of nitric acid. Carbon steel, on the other hand, exhibits the most severe corrosion in sulfuric acid at a concentration of 50%. However, when the concentration reaches over 90%, the corrosion sharply decreases. Therefore, when purchasing solenoid valve products, specific analysis of the type of medium and the degree of corrosion of materials by different concentrations of medium can be conducted, and the manufacturer can also be consulted directly.

挑選耐腐蝕電磁閥

Selecting corrosion-resistant solenoid valves

耐腐蝕電磁閥是專門針對具有腐蝕性介質所提供的解決方案，很多耐腐蝕電磁閥采用非金屬材料作為電磁閥內腔與介質的接觸面。像天然橡膠、聚四氯乙烯等材料，不僅具備良好的耐腐蝕特性，只要項目環境的壓力、溫度符合材料的特性，還起到了節約貴金屬的作用。

Corrosion resistant solenoid valves are solutions specifically designed for corrosive media. Many corrosion resistant solenoid valves use non-metallic materials as the contact surface between the solenoid valve cavity and the media. Materials such as natural rubber and polytetrachloroethylene not only have good corrosion resistance characteristics, but also play a role in saving precious metals as long as the pressure and temperature of the project environment meet the characteristics of the materials.

電磁閥表面處理電磁閥表面處理可以分為熱噴涂和噴刷涂料。熱噴涂是為設備表面添加防護層的一種一種技術之一。熱噴涂是利用高能源密度熱源，如氣體燃燒火焰、電弧、等離子弧、電熱、氣體爆炸等，將金屬或非金屬材料加熱熔融后，以霧化的形式噴射到經預處理的基本表面，形成噴涂層。熱噴涂能提高電磁閥表面的耐腐蝕、耐磨損、耐高溫等特性，延長產品使用壽命。

Surface treatment of solenoid valve The surface treatment of solenoid valve can be divided into Thermal spraying and spraying paint. Thermal spraying is one of the technologies for adding protective layer to equipment surface. Thermal spraying is to use high energy density heat sources, such as gas combustion flame, arc, plasma arc, electric heating, gas explosion, etc., to heat and melt metal or non-metallic materials, spray them to the pretreated basic surface in the form of atomization, and form a spraying layer. Thermal spraying can improve the corrosion resistance, wear resistance, high temperature resistance and other characteristics of the solenoid valve surface, and extend the service life of the product.

噴刷涂料則是一種較為普遍的方法，涂料屬于非金屬材料，涂在金屬表面或內腔，可以有效隔絕介質和大氣，達到防腐目的。控制腐蝕環境控制腐蝕環境主要是針對電磁閥所在的工作環境而言，例如可以有效控制環境中的灰塵、水蒸氣、煙霧和有毒氣體等，保持環境的干凈和干燥。

Spraying paint is a common method, which belongs to non-metallic materials. When applied to metal surfaces or cavities, it can effectively isolate the medium and atmosphere, achieving anti-corrosion purposes. Controlling the corrosive environment is mainly aimed at the working environment where the solenoid valve is located, such as effectively controlling dust, water vapor, smoke, and toxic gases in the environment, and maintaining a clean and dry environment.