Reparo por soldagem em um vaso evaporador de soda cáustica fabricado em níquel

Abstract

Welding repair with linning in nickel-based materials and nickel alloys is a well-applied technique for recovering equipment such as evaporating vessels made of pure nickel and processing products Such as caustic soda. In the preparation and cleaning for welding nickel to acetone, (CHӡ - CHӡ) is the recommended product and commonly used as a normal surface cleaning procedure. In this work of confined space recovery and with the need to neutralize the regions impregnated by caustic soda, acetone was replaced by customer's recommendation for vinegar (acetic acid). This paper aims to evaluate the influence of the cleaning and neutralization method with vinegar on the results to be obtained through non - destructive tests of visual (EVS) and penetrating liquid (LP). In the evaluation of the results there were no visual discontinuities in different quantity and quality, comparing with the normal cleaning method with acetone.