| 摘要 |
<p>The present invention relates to an earth bolt having a surface treated layer, which includes a tin-zinc plating layer, a colored chromate layer and a silicate coating layer, and a surface treatment method for the same. The earth bolt having a surface treated layer has excellent current carrying property and anti-corrosive property to protect electronic parts in a vehicle and remove noise and therefore improve the reliability of a vehicle body.</p> |
