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
 |
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... |
|
|
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... |
 |
MANUFACTURING CNC MACHINING | We are making continuous progress, optimizing internal management, providing manufacturing CNC machiningprocessing and CNC manufacturing equipments... |
 |
AUTOMOTIVE CNC MACHINING | We provide OEM / ODM incremental services and supporting services for customers to grow together according to the customer characteristics of the a... |
 |
MANUFACTURING CNC MACHINING | We are making continuous progress, optimizing internal management, providing cnc machining and manufacturingequipment services in CNC industry with... |
Same products
 |
LDC-350B Automatic Label Die Cutting Machine | Seller: RUIAN LOYAL MACHINERY CO.,LTD | LDC-350B Automatic Label Die Cutting Machine This die cutting machine is ideal for electronic pr... |
 |
LY-RS320 Semi-Rotary Die Cutting Machine | Seller: RUIAN LOYAL MACHINERY CO.,LTD | LY-RS320 SemiRotary Die Cutting Machine This label press machine is the most ideal machine for p... |
 |
Flexo Printing Machine | Seller: RUIAN LOYAL MACHINERY CO.,LTD | In the 1980s, flexographic printing technology developed rapidly. The performance of flexographic... |
 |
LYS-S1300/1600 High speed flexible packing film slitting machine | Seller: RUIAN LOYAL MACHINERY CO.,LTD | LYS-S1300/1600 High speed flexible packing film slitting machine This kind slitting machine is a... |
 |
Die Cutting Machine | Seller: RUIAN LOYAL MACHINERY CO.,LTD | The adhesive label rotary die cutting machineis all kinds of trademarks processed into the final ... |
