铸铁护栏表面最好经过酸洗处理。

2 cast iron guardrail surface best after pickling.

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车辆喷漆前除油及酸洗处理；氧化钛、稀土元素的生产等。

In the production of oil and pickling process, Titanium oxide and rare earth elements of production, etc.

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脱脂及酸洗处理欠好会形成镀层附着力欠好，镀不上锌或锌层掉落。

Degreasing and pickling treatment will lead to the formation of good adhesion of the coating is not good, not on the zinc or zinc coating layer.

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