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Galvanized iron sheet is a kind of steel sheet that has been coated with zinc to prevent corrosion and prolong its service life. GI sheets and coils are steel sheets or coils that have been coated with a layer of zinc to prevent corrosion. This process, known as galvanization, enhances the durability and longevity of the steel, making it suitable for various applications. Galvanized steel offers excellent resistance against water and chlorine but pales in comparison to stainless steel's corrosion resistance when dealing with marine environments. The protective layer on galvanized is also not self-healing like the passive layer on stainless steel.
Sheet piles are sections of sheet steel with interlocking edges (or clutches) that are driven into the ground to provide earth retention and excavation support. Vibratory hammers are often used to install sheet piles, although if soils are too hard/dense impact hammers can be used. Sheet pile walls have been used to support excavations for below-grade parking structures, basements, pump houses, and foundations, to construct cofferdams, and to construct seawalls and bulkheads. Permanent steel sheet piles are designed to provide a long service life.