BLACKENING COATING
Put the metal parts into the solution of NaOH, NaNO2 and other potions. At a certain temperature, the parts will react chemically to produce a thin blue (black) oxide film. Blackening can be divided into normal temperature blackening and high temperature blackening. Generally, the surface oxide film of normal temperature blackening is relatively thin, and the effect of secondary blackening is better. The blackening surface treatmenttemperature at high temperature is about 135 ° to 155 ° and the blackening effect is also the best.
What Is Blackening For Metal?
Metal blackening is a common CNC surface finish treatment process. The purpose of blackening is to prevent rust on the metal surface. There are two kinds of metal blackening: alkaline heating blackening and normal temperature blackening. The problem of checking the antirust effect may occur due to process problems in normal temperature blackening.
How Do You Blacken Metal?
The process flow of metal blackening is as follows:
Degreasing: Boil the parts in degreasing solution for 20~30 minutes at 80~100 ℃.
Cold water cleaning: rinse with flowing clean water.
Pickling: wash with hydrochloric acid solution at room temperature for no more than 30 seconds.
Blackening (put the blackening liquid in a stainless-steel container and heat the bottom with an electric furnace)
Water washing: wash with flowing cold water or warm water for 30-60 seconds.
Boiling water cleaning: 2-5 minutes.
Saponification treatment: temperature 80~90°, time 2-3 minutes.
Immerse in oil: immerse in transformer oil or spindle oil at about 80° for 1-3 minutes, and then the finished product is cleaned.
As a professional cnc machining exporter, Richconn provides cnc machining services, blackening coating, precision cnc machining, etc. Want to know more, contact us.
在线联系供应商
Other supplier products
 |
MANUFACTURING CNC MACHINING | We are making continuous progress, optimizing internal management, providing manufacturing CNC machiningprocessing and CNC manufacturing equipments... |
 |
SURFACE FINISHING | The surface texture treatment requirements of special industries are extremely stringent, such as parts and products in extreme climatic environmen... |
 |
OEM CNC MACHINING SERVICES FROM RICHCONN | Richconn continues to improve and expand in online CNC machining and manufacturing. CNC Machining Services: Providing small to medium precision ... |
 |
ELECTROPHORESIS COATING | Electrophoresis metal coatingcan be called electrocoating, e-coating, electrophoretic painting, and probably a few other things. In any case, the p... |
 |
Black Oxide Services | At Richconn, we rely on rack and suspend technology to provide black oxide coating services that are delivered quickly and meet high quality standa... |
Same products
 |
45KW 1-20KHZ IGBT solid-state Medium Frequency Generator/ Induction Heating Power | 卖方: Dongguan Hitfar Power Technology Co., Ltd | 45KW 1-20KHZ IGBT solid-state Medium Frequency Generator/ Induction Heating Power Descriptions ... |
 |
70kw 1-20KHZ MF Generator/Medium Frequency Induction Heating Machine | 卖方: Dongguan Hitfar Power Technology Co., Ltd | 70kw 1-20KHZ MF Generator/Medium Frequency Induction Heating Machine (Water Cooling) Description... |
 |
90kw 1-20KHZ MF Generator, Medium Frequency Induction Heating Machine | 卖方: Dongguan Hitfar Power Technology Co., Ltd | 90kw 1-20KHZ MF Generator, Medium Frequency Induction Heating Machine (Water Cooling) Descriptio... |
 |
GT-DG250 轧辊机 | 卖方: 肇庆古雷特科技有限公司 | • 产品描述 GT-DG250 缩管机采用一组对辊组件，根据需求加工孔位，逐孔逐级（由大到小）对管材进行缩径。可用于加工铜、铁、不锈钢、铝等材质的圆管、方管、扁管、椭圆管。 &bu... |
 |
Double Spindle Lathe NL251D | 卖方: Lecn Anhui Co., Ltd | A is an advanced CNC lathe equipped with two spindles, typically referred to as the main spindle ... |
