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Verzinkshop Black Stainless Steel Oxide Liquid is the Black Stainless Steel Oxide concentrate, mixed ready-to-use at 1:3 (250 ml concentrate + 750 ml water), so you can immediately start chemically blackening stainless steel. The treatment gives an even gray to gray-black conversion coating without noticeable dimensional change. A sealer is optional and can be applied for extra protection or a specific look. <\/p>\n
Suitable for stainless steel from the 400 series<\/strong>. For 300 series<\/strong> stainless steel, a stronger mixing ratio (1:2 or 1:1) is required \u2014 choose the concentrate<\/a> for this. <\/p>\n Available in:<\/p>\n Need a large quantity? Please contact us<\/a> . <\/p>\n <\/p>\n <\/p>\n Ordinary steel or iron reacts quickly with chemicals such as Galvanizing Black Oxide<\/a>, which produces a deep black finish. However, with stainless steel chemical blacks, the finish is usually gray to iridescent blue-black. This is because stainless steel contains chromium and nickel, which form a thin passive layer that prevents further oxidation.<\/p>\n This passive protective layer influences the way stainless steel reacts to black oxide products. This layer must be removed so that the metal can react with the black oxide products. <\/p>\n Stainless steel from the 300 series, such as 316, is particularly resistant to corrosion and oxidizes more difficult, so that the finish remains lighter. Stainless steel from the 400 series can get a darker finish due to the lower amount of chrome. <\/p>\n <\/p>\n Stainless steel naturally forms a dense chromium oxide layer that prevents further oxidation. This passive layer also blocks the reaction with black-oxide products. Activate removes that layer, allowing the surface to react evenly and giving you an even gray to gray-black finish (especially important with 300 series stainless steel). <\/p>\n Activation can be done in different ways:<\/p>\n \u2022 Chemically with the Verzinkshop Metal Activator<\/a>. (good for stainless steel from the 400 series)<\/p>\n \u2022 With hydrochloric acid: use 30% hydrochloric acid (HCl) diluted 1:1 to 1:3 with water (2\u20135 minutes), then rinse well. (good for stainless steel from the 300 series) <\/p>\n \u2022 Mild alternative: warm citric acid for light activation\/derusting (less powerful on strong passive stainless steel).<\/p>\n \u2022 Mechanical for large and flat surfaces that are easy to sand.<\/p>\n After activation, immediately blacken the object without letting it dry. The rust-inhibiting chromium oxide layer forms again as soon as stainless steel comes into contact with oxygen and moisture, often within seconds to minutes. This process can be accelerated by passivating with citric acid. During blackening, you want to prevent this repassivation between steps, so work “wet-in-wet” and continue treatment immediately after activation. <\/p>\n <\/p>\n Blackening stainless steel with Verzinkshop black Stainless steel oxide liquid for cold chemical blackening stainless steel.<\/p>\n","protected":false},"featured_media":14934,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"parent_description":" Verzinkshop Black Stainless Steel Oxide Liquid is the Black Stainless Steel Oxide concentrate, mixed ready-to-use at 1:3 (250 ml concentrate + 750 ml water), so you can immediately start chemically blackening stainless steel. The treatment gives an even gray to gray-black conversion coating without noticeable dimensional change. A sealer is optional and can be applied for extra protection or a specific look. <\/p>\n Suitable for stainless steel from the 400 series<\/strong>. For 300 series<\/strong> stainless steel, a stronger mixing ratio (1:2 or 1:1) is required \u2014 choose the concentrate<\/a> for this. <\/p>\nAvailable in:\n Need a large quantity? Please contact us<\/a> . <\/p>\n \n <\/p>\n\n Ordinary steel or iron reacts quickly with chemicals such as Galvanizing Black Oxide<\/a>, which produces a deep black finish. However, with stainless steel chemical blacks, the finish is usually gray to iridescent blue-black. This is because stainless steel contains chromium and nickel, which form a thin passive layer that prevents further oxidation.<\/p>\n This passive protective layer influences the way stainless steel reacts to black oxide products. This layer must be removed so that the metal can react with the black oxide products. <\/p>\n Stainless steel from the 300 series, such as 316, is particularly resistant to corrosion and oxidizes more difficult, so that the finish remains lighter. Stainless steel from the 400 series can get a darker finish due to the lower amount of chrome. <\/p>\n <\/p>\n\n Stainless steel naturally forms a dense chromium oxide layer that prevents further oxidation. This passive layer also blocks the reaction with black-oxide products. Activate removes that layer, allowing the surface to react evenly and giving you an even gray to gray-black finish (especially important with 300 series stainless steel). <\/p>\n Activation can be done in different ways:<\/p>\n \u2022 Chemically with the Verzinkshop Metal Activator<\/a>. (good for stainless steel from the 400 series)<\/p>\n \u2022 With hydrochloric acid: use 30% hydrochloric acid (HCl) diluted 1:1 to 1:3 with water (2\u20135 minutes), then rinse well. (good for stainless steel from the 300 series) <\/p>\n \u2022 Mild alternative: warm citric acid for light activation\/derusting (less powerful on strong passive stainless steel).<\/p>\n \u2022 Mechanical for large and flat surfaces that are easy to sand.<\/p>\n After activation, immediately blacken the object without letting it dry. The rust-inhibiting chromium oxide layer forms again as soon as stainless steel comes into contact with oxygen and moisture, often within seconds to minutes. This process can be accelerated by passivating with citric acid. During blackening, you want to prevent this repassivation between steps, so work \"wet-in-wet\" and continue treatment immediately after activation. <\/p>\n <\/p>\n\n\n
Blacken stainless steel with Verzinkshop Black Stainless Steel Oxide<\/h3>\n
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The color of stainless steel after chemical blackening<\/h3>\n
Activating stainless steel<\/h3>\n
Frequently Asked Questions<\/h3>\n
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Stainless Steel Blacks with Verzinkshop Black Stainless Steel Oxide Liquid<\/h2>\n \n
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Blacken stainless steel with Verzinkshop Black Stainless Steel Oxide<\/h3>\n
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The color of stainless steel after chemical blackening<\/h3>\n
Activating stainless steel<\/h3>\n
Frequently Asked Questions<\/h3>\n
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