NEI Corp. introduces Nanomyte~R PT-60, a self-healing coating to reduce corrosion in magnesium alloys

摘要

Somerset, NJ - NEI Corporation announced today that it has completed initial development of a chromate-free, self-healing conversion coating that significantly improves the corrosion resistance of magnesium alloys. A conversion coating, only a few micrometers thick, forms on the surface of a magnesium part when immersed in Nanomyte~R PT-60, which is a waterborne solution. The coating has the ability to "self-heal", i.e. repair itself if scratched or damaged, thereby providing active corrosion protection. In salt-fog exposure experiments (ASTM B117), magnesium AZ91D panels coated only with Nanomyte~R PT-60 show minimal corrosion pitting after ten days (240 h). In contrast, AZ91D panels with conventional pretreatments begin to pit after only 24h.