When most metals come into contact with certain substances in air or water, chemical changes occur that reduce the integrity of the metal. This process is called corrosion. Among them, materials such as oxygen, sulfur, and salt can cause metal corrosion, and metals with good corrosion resistance are represented by stainless steel plates.
When the metal corrodes or deteriorates, it cannot withstand the same load as it did when the corrosion began. So at some point, corrosion can lead to dangerous situations. Metals used in bridges, rails and buildings are subject to corrosion. So monitoring and managing corrosion is very important to avoid the collapse of metal structures.
The corrosion rate of a metal is the rate of deterioration of any given metal in a particular environment. The speed or speed depends on the environmental conditions and the type and condition of the metal. The corrosion rate is based on the number of millimeters per year (in thousandths of an inch).
In order to calculate the corrosion rate, the following information must be known: weight loss (reduction of metal weight in the reference time period), density (metal density), area (initial total area of the metal sheet), time (length of the reference time period).
In order to convert the corrosion rate between annual density and metric tons of equivalent millimeters per year (mm/y), the following formula can be used:
1 mpy = 0.0254mm / y = 25.4 microm / y. Calculate the corrosion rate of metal loss: mm / y = 87.6 × (W / DAT). Where W is the weight loss in milligrams, D is the metal density (g/cm3), A is the sample area (cm2), and T is the metal sample exposure time (hours).
The rate of corrosion is important because the rate of corrosion determines the lifetime of the metal structure. This reality determines the choice of metals for different purposes and in different environments. It also determines the maintenance requirements for metal structures. Metal structures in wet environments may require more frequent maintenance than similar structures in the dryer position. Develop a maintenance plan based on the above calculation types.
Corrosion engineering is a relatively new profession dedicated to slowing down, reversing and avoiding the effects of corrosion on materials and structures. They are responsible for developing coatings and processes that can be used for metals to improve the corrosion resistance of metals. They are also involved in the development of materials that are not easily corroded. For example, new non-corrosive ceramics can sometimes replace metals. Corrosion engineers can recommend and implement solutions where corrosion can be dangerous or expensive.
Source: China Pipe Fittings Manufacturer – wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)
Tuesday, January 4, 2022
Corrosion characteristics of metals such as metal
Related Posts:
Type 347 Stainless Steel (AMS 5512 / AMS 5646) Technical Data Sheet By wilsonpipeline.comChemical Composition LimitsWeight%CPSiNiMnSCrCb + TaFeCoMoCu3470.08 max0.040 max1.00 max9-122.0 max0.030 max17-1910 x C minBal1.00 maxonly AMS 56460.7… Read More
UNS S34700 347 Stainless Steel Pipes, Flanges, Pipe Fittings347 Stainless Steel Detailed DescriptionType 347 stainless steel is a stabilized austenitic stainless steel similar to type 304 with an addition of Co… Read More
Stainless Steel 347/347H By wilsonpipeline.comThese types of stainless steel are austenitic chromium steels containing colubium. They are recommended for parts fabricated by welding which cannot … Read More
347 Stainless Steel Round Bars & Angle Bars By wilsonpipeline.comStainless Steel 347 is a Chromium-Nickel steel that is similar to Type 321 with higher creep strength. It shows great resistance to prolonged heat mak… Read More
Stainless Steel Types Info By wilsonpipeline.comOne of the key advantages of stainless steel lies in the materials sheer versatility. The fact that the precise composition of stainless steel can be … Read More
0 comments:
Post a Comment