Method for Soldering Aluminum and Magnesium

Details

• Personal Author:
  Falke, Wilbert L. ; Lee AY ; Neumeier, L. A.
• Description:
  Aluminum, magnesium, or their alloys are soldered by means of a tin- lead system following initial application of a thin coating of nickel-copper alloy. Thus, 1100 aluminum alloy pieces were chemically etched to clean surfaces and then given an electroless zincate treatment to deposit a thin layer of zinc, using cotton swabs to apply the solution. A ni-cu coating then was applied to the surfaces to be soldered by an electrolytic brush-coating method. Five to ten milliliters of an electrolyte containing 125 g/l of nickel acetate, 10 g/l of copper acetate and 5 g/l of boric acid were applied to the metal pieces as cathodes, and the ni-cu coating deposited with the aid of an anode consisting of a 70 pct ni-30 pct cu rod wrapped with a layer of gauze over cotton batting. The process took about 2 min at a current density of 200 ma/cm2 (based on the contact area between the anode stylus and the ni-cu alloy coating). The deposited alloy layer was about 2 microm thick and contained 50-60 pct ni. The alloy coated aluminum pieces then were soldered using conventional techniques with 60 pct pb-40 pct sn solder and a rosin-type flux. The strengths of the joints were similar to joints between copper-copper or brass-brass substrates. The ni-cu alloy layer can also be applied by a conventional electrolytic cell method using the same electrolyte composition as for the brush-plating technique. [Description provided by NIOSH]
• Subjects:
  Metals Occupational Health Safety
• Keywords:
  Metal Alloys Metallurgical Processes Metallurgy Soldering
• Series:
  Mining Publications
• Document Type:
  Text
• Genre:
  Other
• Place as Subject:
  Missouri ; OSHA Region 7
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  RORC - Rolla Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-6
• NIOSHTIC Number:
  nn:10005490
• Citation:
  US Pat 4,613,069 1986 Sep; :1-6
• CAS Registry Number:
  Aluminum (CAS RN 7429-90-5) ; Magnesium (CAS RN 7439-95-4)
• Federal Fiscal Year:
  1986
• Peer Reviewed:
  False
• Source Full Name:
  United States Patent 4,613,069
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:50160f67042aa2b160758701fae3ea5bae9d25880f67999acf46f065c8132500893c1b11a270eeafe11d134cbb4ef53c74c30bd21cf7a4f0b21fbd0a35294c06
• Download URL:
  https://stacks.cdc.gov/view/cdc/219683/cdc_219683_DS1.pdf
• File Type:
  [PDF - 735.97 KB ]