Electronics Forum | Mon Apr 21 10:59:39 EDT 2008 | davef
That you have 'grainy' solder only at the ends of the connector and not at all solder connections indicates that your quality types are on track and are pointing you in a direction worthy of investigation and developing a better understanding of the
Electronics Forum | Wed Jan 07 07:16:25 EST 2004 | davef
Cold solder prior to properly performing a well designed drop test. Actually, "cold solder" means different things to different people. Two dull solder connection conditions are: * "Disturbed" solder joint: a solder joint that has an "angular face
Technical Library | 2007-08-16 13:34:31.0
While experienced inspectors may be able to determine the aesthetic differences between a lead-free PCB assembly and a tin-lead version, one cannot rely on the "experienced eye". "Less wetting out to the pad edges" (Figure A) and "graininess and lack of shininess of the solder joint" (Figure B) are typical comments about some lead-free solder joints. However, in cases where a Nitrogen atmosphere was present during the reflow of the solder joint (Figure C), there will be little visual differences between the lead free alloys and their tin-lead counterparts.
ASYMTEK Products | Nordson Electronics Solutions | https://www.nordson.com/en/divisions/efd/resource-center/solder-glossary-of-terms
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Blackfox Training Institute, LLC | https://www.blackfox.com/blackfox-to-lead-free-or-not-to-lead-free-that-is-the-question/
. One of the disadvantages of lead free solder is that it is rough and grainy compared to leaded solder. Lead free solder also generally requires tighter temperature regulation on the soldering iron
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