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. Theblackening 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 finishtreatment 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.
Send product request
Other supplier products
 |
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... |
 |
ELECTRONICS CNC MACHINING | Electronics CNCMachining Our purpose is to provide customers with processing services of various testing fixtures, mold parts and non-calibrated p... |
 |
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 ... |
 |
CHINA 4-AXIS & 5-AXIS CNC MACHINING | Richconn's fourth axis cnc& 5 axis CNC machiningservices are ideal for prototypes and low-volume production because we are responsive and we ha... |
 |
CNC MACHINING FOR SPECIAL MATERIALS | Composite processing technology will have many processes, and good products can be made only by repeated grinding. In special environments such as ... |
Same products
 |
What Are The Characteristics Of CNC Machining? | Seller: shenzhen richconn technology co.,ltd | What Are The Characteristics Of CNC Machine? Process concentration, automation, high flexibili... |
 |
PVD COATING | Seller: shenzhen richconn technology co.,ltd | Physical vapour deposition, just PVD coating, as we usually call it, refers to vacuum ion plating... |
 |
ELECTROPHORESIS COATING | Seller: shenzhen richconn technology co.,ltd | Electrophoresis metal coatingcan be called electrocoating, e-coating, electrophoretic painting, a... |
 |
CNC PLASTIC MACHINING | Seller: shenzhen richconn technology co.,ltd | The characteristics of plastic cnc machining chinamaterial are defined by the melting point tempe... |
 |
CNC MACHINING MATERIALS | Seller: shenzhen richconn technology co.,ltd | CNC machining has not too many restrictions on CNC material list. Common plastics, metals, or spe... |
