Galvanized steel pipe, also known as galvanized steel pipe, is divided into two types: hot-dip galvanizing and electrogalvanizing. The hot-dip galvanized coating is thick, uniform, with strong adhesion and long service life. Galvanizing cost is low, and the surface is not very smooth. Galvanized pipe is a kind of steel pipe dipped with zinc protective layer to prevent corrosion and rust. Galvanized pipes were installed in houses built before the 1970s and 1980s. At the time of invention, galvanized pipes were a substitute for water supply pipes. In reality, it is well known that water pipes have been exposed for decades, leading to corrosion and rust of galvanized pipes. What is the galvanized pipe like?
The appearance of galvanized pipe is similar to nickel. However, as time goes by, the galvanized pipe will become darker and brighter, depending on its environment. Many houses with water pipes on them may be difficult to distinguish at first glance.
How do you know if it is galvanized pipe?
If the pipeline can not be judged, you can quickly judge whether it is galvanized. All you need is a flat screwdriver and a magnet. Find the water pipe and scrape the outside of the pipe with a screwdriver.
Comparison results:
copper
The scratch looks like a copper coin. The magnet will not stick to it.
Plastic
Scratches can be milky white or black. The magnet will not stick to it.
Galvanized steel
The scratches will be silver gray. A strong magnet will catch it.
Does the galvanized pipe contain substances harmful to residents?
In the early days of liberation, galvanized pipes installed on water pipelines were immersed in molten natural zinc. The naturally occurring zinc is impure, and these pipes are immersed in zinc containing lead and other impurities. The zinc coating extends the service life of the steel pipe, but adds a small amount of lead and other substances that may harm the residents.
Post time: Jan-06-2023