METHOD AND DEVICE FOR SURFACE TREATMENT OF METAL TUBE

摘要

A method and a device for the surface treatment of a metal tube (3), the method comprising the steps of leading treating liquid (2) into a first distribution container (11) with a flat bottom face and dropping the treating liquid to at least a part of the outer peripheral surface of the metal tube through a plurality of holes formed in the bottom face of the first distribution container, wherein a distance (A) between the bottom face of the first distribution container (11) and the metal tube (3) is desirably be kept constant even if the outside diameter of the metal tube is varied, the treating liquid may be led into the first distribution container through the plurality of holes formed in the bottom face of a second distribution container after being led into the second distribution container with a flat bottom face, and the first distribution container is desirably be such that can drop the treating liquid simultaneously on two or more metal tubes.