Methods of test for metallic and related coatings. Measurement of coating thickness of electrodeposited nickel coatings on magnetic and non magnetic substrates magnetic menthod

2015 ◽  
Keyword(s):  
Coating Thickness ◽  
Nickel Coatings ◽  
Electrodeposited Nickel

scholarly journals Micromechanical and structural properties of nickel coatings electrodeposited on two different substrates

2009 ◽  
Vol 74 (7) ◽  
pp. 817-831 ◽  
Author(s):  
Jelena Lamovec ◽  
Vesna Jovic ◽  
Radoslav Aleksic ◽  
Vesna Radojevic
Keyword(s):  
Structural Properties ◽  
Current Density ◽  
Composite Structures ◽  
Single Crystal Silicon ◽  
Crystal Silicon ◽  
Nickel Coatings ◽  
Electrodeposited Nickel ◽  
Cold Rolled ◽  
Composite Hardness ◽  
Substrate Hardness

Fine-structured nickel coatings were electrodeposited from a sulfamate-based electrolyte onto different substrates: polycrystalline cold-rolled copper and single crystal silicon with (111) orientation. The influence of the substrate layers and chosen plating conditions on the mechanical and structural properties of these composite structures were investigated by Vickers microhardness testing for different loads. Above a certain critical penetration depth, the measured hardness value was not the hardness of the electrodeposited film, but the so-called 'composite hardness', because the substrate also participated in the plastic deformations during the indentation process. Two composite hardness models (Chicot-Lesage and Korsunsky), constructed on different principles, were chosen and applied to the experimental data in order to distinguish film and substrate hardness. The microhardness values of the electrodeposited nickel layers were mainly influenced by the current density. Increasing the current density led to a decrease in grain size, which resulted in higher values of the microhardness.

Analysis of the composite and film hardness of electrodeposited nickel coatings on different substrates

2008 ◽  
Vol 516 (23) ◽  
pp. 8646-8654 ◽  
Author(s):  
J. Lamovec ◽  
V. Jović ◽  
D. Randjelović ◽  
R. Aleksić ◽  
V. Radojević
Keyword(s):  
Nickel Coatings ◽  
Film Hardness ◽  
Electrodeposited Nickel

Forming Mechanism of Composite Coating with Nano-Particles and its Wear Resistance

2013 ◽  
Vol 281 ◽  
pp. 500-504 ◽  
Author(s):  
Xue Song Li ◽  
Long Sheng He ◽  
You Yang
Keyword(s):  
Composite Coating ◽  
Composite Coatings ◽  
Pure Copper ◽  
Copper Substrate ◽  
Nano Particles ◽  
Nano Composite ◽  
Forming Mechanism ◽  
Nickel Coatings ◽  
Electrodeposited Nickel ◽  
Nanometer Particles

Ni-SiC nano composite coatings were prepared on pure copper substrate. The surface morphology and distribution of nanometer particles of the composite coatings were observed by scanning electron microscope (SEM), micro-hardness of coatings was tested by HXD-1000 microharder. The results showed that microstructure of Ni-SiC nano composite coating is different from that of electrodeposited nickel coatings. Its electrodepositing process abided by the principal of adsorption. By adding nanometer particles, the structure of composite coatings can be effectively fined, microhardness of composite coatings is improved apparently by comparing with that of electrodeposited nickel coatings. Abrasion resistance of Ni-SiC nano composite coatings is excellent.

Wear behavior of electrodeposited nickel coating on ZP5 zinc alloy

2020 ◽  
Vol 234 (10) ◽  
pp. 1291-1302
Author(s):  
Dario Croccolo ◽  
Massimiliano De Agostinis ◽  
Stefano Fini ◽  
Giorgio Olmi ◽  
Robusto Francesco ◽  
...  
Keyword(s):  
Coating Thickness ◽  
Applied Load ◽  
Nickel Coating ◽  
Wear Behavior ◽  
Zinc Alloy ◽  
Corrosive Environment ◽  
Statistical Tool ◽  
Aisi 304 ◽  
Electrodeposited Nickel ◽  
Sliding Distance

Nickel coating on zinc alloy is quite promising for the achievement of an additional wear improvement in corrosive environment. To investigate this point, block-on-ring tests were carried out. Blocks measuring 5 × 5×20 mm3 were obtained from real locking components, made of ZP5 EN 12844 and coated by Zn/Cu1Ni5s ISO 1458. As counter material, an AISI 304 with a 40 mm diameter cylindrical geometry was used. Three load levels (5, 10 and 15 N) and three coating thickness levels (low: 5 to 10 µm; medium: 10 to 15 µm; high: 15 to 20 µm) were considered. The sliding distance was initially set to 500 m. Then, since the coating was worn out very quickly during the test, the sliding distance was set to 150 m. The results, in terms of volume loss due to wear, were processed using the statistical tool of two-way ANOVA and Fisher test. It was assessed that the wear rate is strongly affected by the applied load. The coating thickness does not significantly affect the wear.

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