A.是否有足夠的電流流向陰極,以抵消自然腐蝕電流 B.是否有足夠電流流向陽極,以抵消自然腐蝕電流 C.是否有電流
A.涂防腐絕緣層 B.陰極保護(hù) C.犧牲陽極 D.噴緩蝕劑
A.1/4~1/3 B.1/3~2/3 C.1/2~1/3 D.1/2~2/3