船用小牺牲阳极块厂家定制生产牺牲阳极

船用小牺牲阳极块厂家定制生产牺牲阳极

铝合金常用板材厚度:高级金属屋面(和幕墙)系统的一般为0.8-1.2mm(而传统的一般要≥2.5mm).
铝的密度为2.7g/cm3，开路电位:-1.05V左右，电流效率大于70% ，△E=0.25V，通常应用在小于150ΩNaN电阻率的水中，铝阳极通常不在土壤中使用。

海水中的裸露金属表面和涂覆金属表面都可采用阴极保护。无阴极保护的裸金属表面只能由逐渐生成的表面膜来保护，例如，钢板桩、储罐及铜合金管子。金属、腐蚀因素和表面涂层之间的物理作用，很大程度上取决于他们的化学、物理及结构的性质，也取决于其粘结性、渗透性、多孔性和厚度。应当注意，未加工面、船底切变薄或破损点，基体金属变为阳极，因而特别已受局部腐蚀。尤其在只用高性能涂料时，将使腐蚀剂的浸蚀作用限制在缺陷的小范围内，而不会逐渐扩大到那些无言中影响的区域。
Both bare metal surfaces and coated metal surfaces in seawater can be protected by cathodic protection.  Bare metal surfaces without cathodic protection can only be protected by gradually formed surface films, such as steel sheet piles, storage tanks, and copper alloy pipes.  The physical effects between metals, corrosion factors and surface coatings depend to a great extent on their chemical, physical and structural properties, as well as on their adhesion, permeability, porosity and thickness.  It should be noted that the raw surface and bottom of the ship are thinned or damaged, and the base metal becomes anode, thus it has been specially corroded locally.  Especially when only high-performance coatings are used, the etching effect of corrosive agents will be limited to a small range of defects, and will not gradually expand to those areas that will be affected in silence.

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