Nut black oxide surface Magnesium stick an electrochemical corrosion test standards ASTMG97-89, the current efficiency is greater than or equal to 50 percent, the actual 1100Ah/kg capacitance greater than or equal Core and the anode should not exceed 01 ohm resistors4 welding between the core and the nut thickness of greater than or equal to Anode rod location with the nut welded stress test, test pressure ≥ 5Bar, packing more than 5 seconds, no- Anode rod and nut assembly was conducted after the 100kg, where testing, product can not pull off or cause other Core eccentricity of less than 5mm应该是这样吧