연구팀은 이에 전류의 방향을 초당 100회 이상의 속도로 반복해서 변경하는 펄스·역전류 전해도금 방식으로 55도에서 30분간 피복관 내부를 크롬으로 코팅하는 기술을 개발했다. 이 기술은 전류 방향을 빠르게 바꿔 불순물이 코팅층에 붙는 것을 막아 순수 크롬 코팅층을 만들 수 있다. 이를 통해 20마이크로미터 두께로 균일한 코팅층을 만드는데 성공했으며, 기존 방식 대비 코팅층 두께 오차를 3분의1로 줄였다.

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