Electronics Forum: sulfur cardboard (5)

PCB becomes darken (yellownish)

Electronics Forum | Fri Aug 22 09:07:22 EDT 2008 | blnorman

Sulfur is probably the culprit. Board supplier should be providing boards with anti-tarnish sheets between the individual boards. Also, cardboard is a major source of sulfur and so boards should not be shipped in cardboard.

Oxidation on PCB's

Electronics Forum | Mon Aug 04 12:38:25 EDT 2008 | blnorman

Avoid cardboard boxes as well. They are sulfur bearers, and silver has an affinity to form silver sulfide.

Express Newsletter: sulfur cardboard (9)

Tin Whiskering on PCBA Capacitors in Storage (Inside ESD Bag, Inside a Sealed Cardboard Box)

Tin Whiskering on PCBA Capacitors in Storage (Inside ESD Bag, Inside a Sealed Cardboard Box) Tin Whiskering on PCBA Capacitors in Storage (Inside ESD Bag, Inside a Sealed Cardboard Box) The tin whisker failures investigated in this paper were

SMTnet Express - July 16, 2015

SMTnet Express, July 16, 2015, Subscribers: 23,036, Members: Companies: 14,463, Users: 38,550 Testing Printed Circuit Boards for Creep Corrosion in Flowers of Sulfur Chamber iNEMI (International Electronics Manufacturing Initiative) Qualification


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