Testing is based on the ISA-S71.04-1985 standard. However we are developing a new standard for realistic sulfur corrosion testing of printed circuit boards.

Sulfur corrosion of PCBAs is a significant problem for major hardware manufacturers. They are having many problems with sulfur corrosion at tire factories, paper mills, fertilizer plants, and polluted locations in developing countries. DLi Labs is the first lab in the world to offer this service, with testing based on realistic levels of sulfur exposure.

The transition away from SnPb HASL surface finish toward ImAg on electronic products has resulted in creep corrosion when these products are exposed to high sulfur environments under elevated humidity. The creep corrosion product is primarily Cu2S which is produced by galvanic driven attack of the copper beneath the edge of the soldermask.