定义
所谓烤蓝是钢铁零件表面处理的一种防腐蚀的工艺。其原理就是在钢铁表面生成一定厚度和强度的致密的氧化层，成分主要是Fe3O4，反应原理是铁和水的氧化反应，其反应式可以用下面的 方程式表达
3Fe + 4H2O =高温=Fe3O4 + 4H2 .
烤蓝
虽然名为烤蓝，其实是用化学药品如钠之类在高温下将金属表面氧化为氧化物，形成比较能抗锈蚀的保护层。根据金属材质的不同（碳钢、不锈钢、铝合金）、化学药品的不同、施工程序的不同（温度控制、事前喷沙处理等）会产生不同的颜色，最普遍的是非常接近黑色的深蓝黑色。 烤蓝可以防止钢铁生锈。支大都经过烤蓝。放进去的可能是水和保护气（如氮气） 烤蓝只是将零件用水润湿了以后用火烧的，注意水最好是纯净的如果不纯就会出现斑纹，如钢锯条的两端自己抛光的话最好去买几张细的水砂纸，蘸上水后往一个方向打磨，千万不要往复的磨，并且要有耐心，用力要适中且均匀在火上烤时温度不要过高，变色为止，否则弹匣会退火，在煤气上炉烤也可以，但气体不纯易变色得重来。颜色是烧铁的色 放进沸腾的浓肥皂溶液里泡十分钟，（皂化） 最后浸热油即可．
烤蓝的方法
碱性氧化法“烤蓝”药液
配方： 钠50～100克氢氧化钠600～700克亚钠100～200克水1000 2．制
法：按配方计量后，在搅拌条件下，依次把各料加入其中，溶解，混合均匀即可。
说明：
金属表面务必洗净和干燥以后，才能进行“烤蓝”处理。
金属器件进行“烤蓝”处理条件与金属中的含碳量有关，“烤蓝”药液温度及金属器件在其中的处理时间可参考下表。金属中含碳量%工作温度（℃）处理时间（分）开始终止>0.7135-13714310-300.5-0.7135-14015030-50<0.4142-145153-15540-60合金钢142-145153-15560-90
每隔一星期左右按期分析溶液中钠、亚钠和氢氧化钠的含量，以便及时补充有关成分。一般使用半年后就应更换全部溶液。
金属“烤蓝”处理后，最好用热肥皂水漂洗数分钟，再用冷水冲洗。然后,又用热水冲洗，吹于。
酸性氧化法“烤蓝”药液
配方： 磷酸3～10克钙80～100克过氧化锰10～15克水1000克
制法：按配方计量后，在不断搅拌条件下，依次把磷酸、过氧化锰和钙加入其中，溶解，混合均匀即可。
说明：
金属器件先经洗净和干燥后才能进行“烤蓝”处理。
此法所得保护膜呈黑色，其主要成分是由磷酸钙和铁的氧化物所组成，其耐腐能力和机械强度均超过碱性氧化法所得的保护膜。
4.“烤蓝”工作温度为100℃，处理时间为40～45分钟。在处理碳素钢时，药液中磷酸含量控制在3～5克／升；处理合金钢或铸钢时，磷酸含量控制在5～10克／升。应注意定期分析药液磷酸的含量。
5.“烤蓝”处理后金属器件的清洗方法同上。
Define the so-called grilled blue is the surface treatment of steel parts of a process of corrosion protection. Its principle is to generate a certain thickness on steel surface and the strength of dense oxide layer, components mainly Fe3O4, reaction principle is iron and water oxidation reaction, the reaction can use the following formula expression 3Fe + 4H2O = high temperature = Fe3O4 + 4H2. Grilled blue though, named grilled blue is in fact such chemicals such as sodium nitrate in the metal surface under high temperature oxidation comparison for the formation of oxide, resistant to corrosion protection layer. According to the different metallic materials (carbon steel, stainless steel, aluminum), chemicals, construction program (temperature control, prior sandblasting treatment, etc.) will have a different color, the most common is very close to the black dark blue to black. Grilled blue can prevent iron and rust. Firearms are mostly after baking blue. In the car may be the water and the protection of gas (e.g. nitrogen) grilled blue only parts water wetting after the fire, that water preferably pure if not pure
appears markings, such as steel blade ends its own polishing so it is best to buy some pieces of fine water sandpaper, dip water to one direction grinding, please do not wear, and reciprocating motion patience, using low to moderate and evenly roasted on the fire at the temperature not higher, discoloration, or the magazine will be on the gas annealing ovens can also, but the gas was not pure easy color change again. Color is the color of burning iron into boiling concentrated SOAP solution soak for 10 minutes, (saponification) finally soak in hot oil. Grilled blue method alkaline oxidation \"grilled blue\" liquid formula: sodium nitrate 1.50 ~ 100 g of sodium hydroxide 600 ~ 700 grams of sodium nitrite 100 ~ 200 grams of water 1000 2. method: measurement by formula, in mixed conditions, and then click join various material, dissolved, mix uniformly. 3. Description of: (1) metal surface must be clean and dry, you can \"bake blue\". (2) metal devices \"grilled blue\" processing conditions and metal in the carbon content related to \"roasted blue\" liquid temperature and metal device in which the processing time may refer to the following table. Metal carbon content% operating temperature (℃) processing
time
(min)
began
termination
>
0.7135-13714310-300.5-0.7135-14015030-50 < 0.4142-145153-15540-60 steel 142-145153-15560-90 (3) every other week or so regular analysis solution of sodium nitrate, sodium nitrite, sodium hydroxide and content in order to supplement the relevant constituents in a timely manner. General use for half a year after the full solution should be replaced. (4) Blue Metallic \"roast\" after processing, preferably with hot soapy water, rinse several minutes and then rinse with cold water. Then, wash with hot water, blowing in. Acid oxidation \"grilled blue\" liquid formula: phosphoric acid 1.3 ~ 10 grams of calcium nitrate 80 ~ 100 g peroxidation manganese 10 ~ 15 grams of water 1000 grams 2. method:
measurement by formula, constantly stirring conditions, and then click the phosphoric acid, nitric acid, calcium, manganese and join, dissolved, mix uniformly. 3. Description of: (1) metal devices first wash and dry before you can \"bake blue\". (2) of this Act from the protective film black, its main ingredient is composed of calcium and iron oxides are formed, its decay capacity and mechanical strength are longer than alkaline oxidation of protective film. 4. \"grilled blue\" operating temperature of 100 ° c, processing time is 40-45 minutes. When dealing with carbon steel, liquid in content control for 3 ~ 5 g/l; dealing with alloy or steel, the phosphate content control in 5-10 grams/liter. It should be noted that regular analysis solution of phosphoric acid content. 5. \"grilled blue\" processed metal device cleaning methods ibid.