Electrochemical milling removes burrs and solder from the cut ends of stainless steel capillary tubing. An electrolyte consisting primarily of a solution of sulfuric and phosphoric acids is used

Hinshaw, J. O.

English

NASA Technical Reports Server

August 1966	 Brief 66-10358 
NASA TECH BRIEF	
-I& 
NASA Tech Briefs are issued to summarize specific innovations derived from the U. S. space 
program and to encourage their commercial application. Copies are available to the public from 
the Clearinghouse for Federal Scientific and Technical Information, Springfield, Virginia 22151. 
Electrochemical Milling Removes Burrs and Solder from Tubing Ends 
The problem: 
To devise an effective method for removing burrs 
and solder from the cut ends of stainless steel capil-
lary tubing in soft soldered bundles. 
The solution: 
Remove the burrs and solder around the passages 
on the ends of the tubing by electrochemical milling, 
using an electrolyte consisting primarily of a solution 
of sulfuric and phosphoric acids. 
How it's done: 
The tube bundle is connected as an anode, with the 
cut end of the bundle positioned in the electrolyte at a 
distance of 0.25 to 0.50 inch from a copper cathode. 
The cut end of the bundle is held in a flat ring, making 
the tubing ends to be milled flush with the surface of
the ring. The electrolysis is carried out with a direct 
current at 3 to 8 volts applied to the electrodes. 
Note: 
Inquiries concerning this innovation may be di-
rected to:
Technology Utilization Officer 
Marshall Space Flight Center 
Huntsville, Alabama 35812 
Reference: B66-10358 
Patent status: 
No patent action is contemplated by NASA. 
Source: J. 0. Hinshaw 
of North American Aviation, Inc. 
under contract to 
Marshall Space Flight Center 
(MFS-7 14) 
Category 03 
This document was prepared under the sponsorship of the National 
Aeronautics and Space Administration. Neither the United States 
Government nor any person acting on behalf of the United States
Government assumes any liability resulting from the use of the 
information contained in this document, or warrants that such use 
will be free from privately owned rights.
https://ntrs.nasa.gov/search.jsp?R=19660000357 2020-03-11T17:41:06+00:00Z


Electrochemical milling removes burrs and solder from tubing ends

Abstract

Similar works

Full text

Available Versions

NASA Technical Reports Server