So galvanization passivation treatment is necessary steps.

故镀锌钝化处理是必不可少的步骤。

Circulate passivation solution as per recommended conditions.

根据推荐的条件，循环钝化溶液。

Activation: the metal surface passivation state disappear role.

活化：使金属表面钝化状态消失的作用。

Allocating the state to a persistent store is known as passivation.

将状态分配到持久性存储中就是所谓的钝化(passivation)。

Passivation with nitric acid is required after an oxalic acid rinse.

用草酸冲洗后，必须要用硝酸钝化。