Aluminium plate application on the ship
Ship structures are mostly used in harsh seawater and marine environments. Therefore, whether aluminium plate alloys are resistant to corrosion is one of the main signs that determine whether they can be used as marine grade aluminum plate alloys. It is generally required that marine grade aluminum alloy substrates and welded joints have no stress corrosion, spalling corrosion and intergranular corrosion tendencies in seawater and marine environments. The contact corrosion, crevice corrosion and sea-biofouling corrosion should be avoided as much as possible. The minor uniform corrosion and spotting corrosion are allowed. Experience has shown that any boat made from aluminium plate can be used for decades without any significant corrosion. The decommissioning of such ships is usually due to outdated technology rather than the aging of aluminum structures. Overall, the excellent marine weathering resistance of the 5000 series and 6000 series aluminum-magnesium alloys, especially seawa...