And then electroplate nickel-sealing with solid particulate, which is to make micro-crack chromium when electroplating chromium again, this can avoid unsmoothness, and slower corrosion speed, as a result, improve defence performanc e.

• 再镀一层含有固体微粒的镍封，令到再镀铬时形成微孔铬，从而防止产生大而深的直贯基体金属的少量腐蚀沟纹和凹坑，向横向发展，减缓了穿透基体的腐蚀速度，进一步提高了防护性能。