Electrolytic galvanizing technology on internal surfaces of machined parts using computer numerical control (CNC)

Abstract

In the present investigation, the study of the Zinc electrolytic galvanizing process on the interior surfaces for high-pressure pipe couplings is detailed, this through a statistical factorial analysis 23 that allowed to relate the 3 factors of the experimentation layout of parts, electrolyte agitation and immersion time; in this way, 8 types of possible iterations were determined in order to analyze the correlation and the incidence in the quality of the anticorrosive protection under the ISO 10289:2001 standard. The adequate levels of the electrolyte were determined using a Hull cell, and optimal working parameters were established at a temperature of 20 °C, a current density of 2.7 A/dm2 and a voltage of 5 V. After experimentation it was determined that the arrangement of the parts is the most determining factor for the coating to provide good anti-corrosion protection in combination with acid baths. The methodology used could serve as a basis for the collection of new results and possible comparisons.