... .marine anchor,tubing anchors,casing anchor,wedge anchor zinc platedCasting: investment casting ,precision casting, lost wax ... , thread cutting.Surface treatment: glass rays electrolytic polishing, coating, varnishing, bromzing. Passivating, grinding, polishingAnalysis wet chemically ... stress ,notched bar impact tenacity, x-ray,metallograph.Quality control: According to ISO 9001 2001 Galvanizing Marine ...