Chromic anhydride 30g/L, nitric acid 6mL/L, sulfuric acid 6mL/L, hydrochloric acid 6mL/L, phosphoric acid 13mL/L, temperature 20-30℃, pH 1-1.5, time 40-90 seconds, hang Plastic for utensils.
Military green passivation, also known as grass green passivation or five-acid passivation, is one of the post-treatment methods for galvanized layers. The appearance of this passivation film ranges from military green to gray green, just like a paint layer.
Army green: 5 acid passivation, chromic anhydride, phosphoric acid, nitric acid, hydrochloric acid, sulfuric acid. Color classification: reddish brown - red and yellow bright colors - greenish - bluish white.