A "new word of the day" for the first day of August, 2012:
Embrittlement
Definition:
1. Reduction, or loss, of ductility or toughness in a metal or plastic
2. Easy to be broken, cracked, or snapped.
3. Make glass-like
-An AGO member's recent request for guidance on remedies to/for a customer's wheels that have "flaking chrome",
brought to mind a phenomenom called:
Hydrogen Embrittlement
-Many, in the manufacturing processes of
'metals/metal-alloys', are very concerned about the introduction,
(and removal), of corrosive-natured-hydrogen...including the electroplating-processes of wheels; such as:
high-strength steel, aluminum/titanium alloyed wheels---even titanium fasteners utilized in 3-piece wheels...
which can seriously reduce ductility, load-bearing capacity, and cause cracking (brittleness) of many metals/alloys.
-Hopefully, this "flaking-chrome" on the wheels of this AGO member's customer,
is only the results of an improper,
final chromium-electroplating process...
Not improper removal/expelling of hydrogen during the baking/heat-treating process of their manufacturer/vendors.
(Or, their QC Depts. not following the guidelines of several ASTM Standard Testing methods, as well.)
-I surely would hate to hear of any catastrophic failure events!!
BTW...An excellent read, for anyone so interested:
Corrosion Engineering: Principles and Practice ~ Pierre R. Roberge
Bob