floating ball valve top entry ball valve 3pc forged ball valve forged steel ball valve trunnion mounted ball valve
Corrosion of valves, valve is usually interpreted as a metal material in the chemical or electrochemical environment under the action by the damage. As the "corrosion" phenomenon seen in the metal and the surrounding areas of spontaneous interaction, and how the metal will be cut off from the surrounding environment or the use of more non-metallic composite materials, is the focus of anti-corrosion.
The valve body (including the valve cover), occupying most of the weight of the valve, in regular contact with the media, so selection of valves, often starting materials from the body.
Body of no more than two forms of corrosion, or chemical corrosion and electrochemical corrosion. It decided to speed the corrosion of the medium temperature, pressure and chemical properties as well as the body of the anti-corrosion material. Corrosion rate can be divided into six and so on
1, completely corrosion: corrosion rate of less than 0.001 mm / year
2, a corrosion: corrosion rate from 0.001 to 0.01 mm / year
3, corrosion resistance: corrosion rate from 0.01 to 0.1 mm / year
4, is still corrosion: corrosion rate from 0.1 to 1.0 mm / year
5, poor corrosion resistance: corrosion rate from 1.0 to 10 mm / year
6, no corrosion: corrosion rate of greater than 10 mm / year
Body of corrosion is the right choice of materials. While the corrosion of the very rich in information, but whether the election properly, or not easy, because corrosion problems are complex, such as sulfuric acid at low concentrations on the steel Corrosive great, so that when a high concentration of steel produced Passive film, to corrosion; only hydrogen under high temperature and high pressure on the steel Corrosive show a strong, dry chlorine in a state of corrosion is not the presence of a certain corrosion at high humidity, many of the materials can not . Body material selection difficulties, is not only corrosion problems at the same time must consider the ability to heat-tolerant and economically reasonable, is it easy to buy, and so on. So is the need to carefully.
The valve body (including the valve cover), occupying most of the weight of the valve, in regular contact with the media, so selection of valves, often starting materials from the body.
Body of no more than two forms of corrosion, or chemical corrosion and electrochemical corrosion. It decided to speed the corrosion of the medium temperature, pressure and chemical properties as well as the body of the anti-corrosion material. Corrosion rate can be divided into six and so on
1, completely corrosion: corrosion rate of less than 0.001 mm / year
2, a corrosion: corrosion rate from 0.001 to 0.01 mm / year
3, corrosion resistance: corrosion rate from 0.01 to 0.1 mm / year
4, is still corrosion: corrosion rate from 0.1 to 1.0 mm / year
5, poor corrosion resistance: corrosion rate from 1.0 to 10 mm / year
6, no corrosion: corrosion rate of greater than 10 mm / year
Body of corrosion is the right choice of materials. While the corrosion of the very rich in information, but whether the election properly, or not easy, because corrosion problems are complex, such as sulfuric acid at low concentrations on the steel Corrosive great, so that when a high concentration of steel produced Passive film, to corrosion; only hydrogen under high temperature and high pressure on the steel Corrosive show a strong, dry chlorine in a state of corrosion is not the presence of a certain corrosion at high humidity, many of the materials can not . Body material selection difficulties, is not only corrosion problems at the same time must consider the ability to heat-tolerant and economically reasonable, is it easy to buy, and so on. So is the need to carefully.
