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china latest news about Selection and marking of plating layers - classification of coating usage conditions

Selection and marking of plating layers - classification of coating usage conditions

September 20, 2023

The usage conditions of coatings are divided into the following three categories according to the degree of climate environment. Category 1: severely corrosive working environment. Category 2: moderately corrosive working environment. Category 3: slightly corrosive working environment. From the ...
china latest news about Selection and marking of plating layers - requirements for plating layers

Selection and marking of plating layers - requirements for plating layers

September 19, 2023

The main purpose of electroplating is to: 1. Protect the surface of metal parts and prevent corrosion. 2. Decorate the appearance of parts to make them beautiful. 3. Improve the working performance of parts. The selection of electroplating layer type and thickness mainly depends on the following ...
china latest news about Coating performance test - testing of coating welding performance

Coating performance test - testing of coating welding performance

September 18, 2023

The solderability of the coating indicates the ease with which solder flows on the surface of the metal to be soldered. Methods to evaluate the weldability of coatings include flow area method, wetting time method and steam test method. Flow area method: This method is to place a certain mass of ...
china latest news about Coating performance test - hydrogen embrittlement test

Coating performance test - hydrogen embrittlement test

September 16, 2023

The early brittle fracture phenomenon of metallic materials under the combined action of hydrogen and stress is called hydrogen embrittlement. Methods for measuring hydrogen embrittlement include delayed failure test, slow bending test and other methods. Delayed destruction test: this method is ...
china latest news about Coating performance test - electroplated layer brittleness test

Coating performance test - electroplated layer brittleness test

September 15, 2023

The brittleness of the coating is an important indicator of the physical properties of the coating. The existence of brittleness often leads to cracking of the coating, reduced bonding strength, and even directly affects the use value of the plated parts. The brittleness of the coating is generally ...
china latest news about Coating performance test - testing of internal stress in coatings

Coating performance test - testing of internal stress in coatings

September 14, 2023

The internal stress of the coating refers to the equilibrium stress inside the coating without external load. Methods used to measure the macroscopic stress of coatings include: slide projection method, resistance strain gauge method, spiral shrinkage meter method, X-ray diffraction method, etc.
china latest news about Coating performance test - determination of microhardness of coatings

Coating performance test - determination of microhardness of coatings

September 13, 2023

Hardness is one of the important mechanical properties of coatings. The hardness of the coating is determined by the crystal structure of the coating metal. In order to eliminate the influence of the base material on the coating and the limitation of the indentation size caused by the thickness of ...
china latest news about Coating performance test - determination of porosity

Coating performance test - determination of porosity

September 12, 2023

The pores of the coating refer to the small pores from the surface of the coating to the base metal. The size of the pores affects the protective ability of the coating. Methods for measuring pores include filtering method, paste method, dipping method, etc. Filter paper pasting method: Paste the ...
china latest news about Coating performance test - measurement of electroplated layer thickness

Coating performance test - measurement of electroplated layer thickness

September 11, 2023

The measurement methods of electroplating layer thickness include destructive detection methods and non-destructive detection methods. Among them, there are many destructive detection methods such as droplet method, liquid flow method, dissolution method, electrostatic method and metallographic ...
china latest news about Coating performance test - binding force test

Coating performance test - binding force test

September 9, 2023

Coating bonding strength refers to the bonding strength between the coating and the base metal, that is, the force required to peel off the coating from the base metal per unit area. The poor bonding strength of the coating is mostly caused by poor external treatment before plating. In addition, the ...
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