Answer
Pasivación ha'e peteĩ tratamiento químico (jepivegua ácido nítrico térã cítrico-pe) oipe'áva ‘hierro libre’ anillo de acero inoxidable superficie-gui ha omombaretéva capa protectora óxido de cromo. Umi aplicación médica-pe guarã, péva tuicha mba'e ohapejokóvo mancha ‘herrumbre’ ha oasegura biocompatibilidad. Ko proceso osegi umi norma ASTM A967. In a spiral ring, which has multiple layers in close contact, passivation must be performed carefully to ensure the acid reaches the surfaces between the turns. Pe hierro libre opyta ramo atrapado umi giro mbytépe, ikatu ogueru corrosión galvánica localizada. Post-passivation, the rings are rinsed in deionized water to ensure no chemical residue remains, which could cause adverse reactions in a clinical setting.
