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.
Отправить запрос, связаться с поставщиком
Другие товары поставщика
 |
CUSTOM PVD COATING SERVICE | As a professional PVD coated stainless steel companies, we offer our customers a wide selection of PVD coated stainless steel. Our ar pvd coatingst... |
|
|
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... |
 |
PVD COATING | PVD COATING Physical vapour deposition, just ar PVD coating, as we usually call it, refers to vacuum ion plating and vacuum sputter plating; Gener... |
 |
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... |
 |
MANUFACTURING CNC MACHINING | We are making continuous progress, optimizing internal management, providing manufacturing CNC machiningprocessing and CNC manufacturing equipments... |
Похожие товары
 |
Китайская вальцовочная машина GT-DG250 | Продавец: Чжаосин-гуретт технолоджис лимитед | • Описание Машина для вальцовки труб GT-DG250 использует пару вальцующих узлов, а также ряд ... |
 |
Double Spindle Lathe NL251D | Продавец: Lecn Anhui Co., Ltd | A is an advanced CNC lathe equipped with two spindles, typically referred to as the main spindle ... |
 |
Automobile Torsion Beam Milling Machine X8220125 | Продавец: Lecn Anhui Co., Ltd | Both ends of the one clamping are processed at the same time, the with 1250-1550 mm workpiece len... |
 |
Joint Cross Machine CZ821030/TZ820510 | Продавец: Lecn Anhui Co., Ltd | Both ends of the one clamping are processed at the same time, the with 100-300 mm workpiece lengt... |
 |
Break Cam Milling Machine CM0525 | Продавец: Lecn Anhui Co., Ltd | can precision milling cam diameter of 250 mm, which is suitable for milling automobile brake cams... |
