OXIDAÇÃO NEGRA: Como Fazer (Passo a Passo)

Learn how to perform black oxidation on carbon steel with a complete step-by-step guide, from preparing the solution to the final finish. In this video, I show the recipe, the ideal temperature, the immersion time, safety precautions, and answer the most frequently asked questions about this process. Black oxidation is a chemical treatment that transforms the surface layer of carbon steel into magnetite, providing a black, shiny, and elegant finish with the characteristic Black Piano effect, in addition to helping increase its corrosion resistance. In this video you will learn: ✔ How to prepare the solution correctly; ✔ The complete recipe for black oxidation; ✔ The ideal temperature for the bath; ✔ The correct immersion time; ✔ How to neutralize the piece after the process; ✔ Which steels can receive this treatment; ✔ The differences between black oxidation and coffee plating; ✔ How to obtain a uniform and high-quality finish. RECIPE USED • 1 liter of demineralized water • 450 g of 99% caustic soda • 150 g of sodium nitrate • Temperature: 130 °C • Immersion time: 10 minutes • Neutralization: boiling water ⚠️ WARNING: This procedure uses highly corrosive chemicals and may release dangerous fumes. Always use appropriate PPE, including gloves, safety glasses, respiratory protection, and appropriate clothing. Perform the process only in an open and well-ventilated area, away from children, animals, and other people. Perform this procedure only if you have the knowledge and adequate conditions to do so safely. If this content was useful to you, leave a like, subscribe to the channel, and follow the upcoming videos on cutlery, knife making, forging, metallurgy, and surface treatments. 📺 Also check out the other complete knife constructions available on the channel. WHERE TO FIND SODIUM NITRATE? The sodium nitrate used in this video was purchased from T Force. This is just a recommendation based on my experience, as this product is often difficult to find. https://www.tforceequipamentos.com.br/ 🔗 Watch the complete manufacturing process of the knife used in this video:    • Construindo uma Fighter com Guarda de Esco...   🌐 WEBSITE https://marcelaolubaczwski.com 📧 EMAIL [email protected] 📱 WHATSAPP https://wa.me/5551984417058 🎟️ RAFFLE GROUP https://chat.whatsapp.com/EHIEQu99wsI... 📷 INSTAGRAM @marcelaolubaczwski 📌 CHANNEL PARTNERS ⚒️ FarmWood Instagram: @_farm_wood_28 ⚒️ Valebrite Instagram: @valebrite.cutelaria ⚒️ Dresch Couros Instagram: @dreschcouros ⚒️ Albino Fraga Instagram: @albinofragaloja ⚒️ TForce Instagram: @tforce_equipamentos ⚒️ Rodrigo Engraver Instagram: @rodrigoengraver ⚒️ Thiago Beltramini Instagram: @thiagosbeltramini ⚒️ Pedras RLQ Instagram: @pedrasrlq ⚒️ Resinas Colmeia Instagram: @colmeia.resinas #BlackOxide #Knifemaking #CarbonSteel #KnifeManufacturing