Solution of surface preparation to use prior to treatment of phosphate Chemical conversion of a Steel Element, method for Manufacturing a surface treated Steel Element and Steel element

摘要

Subjecting a threaded Joint for tubular elements for Oilfield Surface preparation (OCTG) with an aqueous solution of Potassium TETRABORATE and SODIUM TETRABORATE pretreatment chemistry of manganese phosphate conversion coating, a conve Rsion chemistry of manganese phosphate Crystal Grain thickWith average diameter of Crystal Grain of 10 - 110 microns on the surface of the Steel Element, which can be made of any Steel including high CR Steel.This phosphate Chemical conversion Coating manganese can retain a large amount of a Liquid Lubricant, being effective to prevent the occurrence of injury at the time of the threading of a threaded Joint for tubular elements for petrofu00edleros Fields.