Air Stepper Locking Fasteners
Quick Details
Place of Origin:Guangdong, China (Mainland), Guangdong, China (Mainland)
Brand Name:Lanejoy, Lanejoy
Model Number:PG18
Standard:GB
Material:Carbon Steel
Surface treatment:Zinc Plated Polished
Certificate:ISO9001:2015
Color:Zinc White
Size:Customized
Price Terms:FOB,CIF,CRF,EXW and others
Delivery Time:Within 20 workdays after receive payment
Model:Pg18
Packaging & Delivery
Packaging Details
opp bag/carton
Delivery Time
7 days
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Main Markets | Total Revenue(%) |
Southeast Asia | 20% |
South Asia | 20% |
Mid East | 20% |
Eastern Europe | 18% |
Northern Europe | 10% |
North America | 10% |
Africa | 2% |
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The surface of the steel parts is blackened, and there are also known as blackening and blackening treatments. The common methods used today are the conventional alkaline warming and blackening and the later normal temperature blackening. However, the normal temperature blackening process is not very effective for low carbon steels.
A3 steel with alkaline black better. Alkaline blackening was subdivided and there was a difference between blackening and blackening. The main components of the blackening liquor are sodium hydroxide and sodium nitrite. The degree of latitude needed for darkening is relatively large. A good surface can be obtained between 135 degrees Celsius and 155 degrees Celsius, but it takes only a little time. In actual operation, it is necessary to pay attention to the quality of rust removal and degreasing prior to the blackening of the workpiece, and to passivation and immersion oil after blackening. The quality of blackening often changes due to these processes. Metal "blue" liquid