Assertion: pb solder | /r/CapableOf | form complex 4-layer structure
Facets:
value: below it
type: LOCATION
Source sentences:
text: Sn-Pb solder oxidizes on the surface, forming a complex 4-layer structure: tin(IV) oxide on the surface, below it a layer of tin(II) oxide with finely dispersed lead, followed by a layer of tin(II) oxide with finely dispersed tin and lead, and the solder alloy itself underneath.