Influence of electric brush‐plating voltage on hydrophobic behaviour of a cauliflower‐like Ni coating surface

2018 ◽  
Vol 13 (8) ◽  
pp. 1159-1164
Author(s):  
Jing Li ◽  
Fengyu Fan ◽  
Qiang Li ◽  
Feng Du ◽  
Huadong Yu
Keyword(s):  
Coating Surface ◽  
Brush Plating

Flexographic ink-coating interactions: effects of latex variations in coating layers

TAPPI Journal ◽  
2016 ◽  
Vol 15 (4) ◽  
pp. 253-262 ◽  
Author(s):  
ERIK BOHLIN ◽  
CAISA JOHANNSON ◽  
MAGNUS LESTELIUS
Keyword(s):  
Contact Angles ◽  
High Ratio ◽  
Print Quality ◽  
Particle Sizes ◽  
Mixed Composition ◽  
Coating Surface ◽  
Covered Area ◽  
Surface Optical ◽  
Flexographic Printing ◽  
Coating Formulation

The effect of coating structure variations on flexographic print quality was studied using pilot-coated paperboard samples with different latex content and latex particle sizes. Two latexes, with particle sizes of 120 nm and 160 nm, were added at either 12 parts per hundred (pph) or 18 pph to the coating formulation. The samples were printed with full tone areas at print forces of 25 N and 50 N in a laboratory flexographic printing press using a waterbased ink. A high ratio of uncovered areas (UCAs) could be detected for the samples that contained 18 pph latex printed at a print force of 25 N. UCAs decreased with increased print force and with decreased amounts of latex in the coating formulation. The fraction of latex covered area on the coating surface was estimated to be 0.35–0.40 for the 12 pph, and 0.70–0.75 for the 18 pph samples. The ink penetration depth into the coating layer could be linked to the fraction of latex-free areas on the coating surface. Optical cross section microscopy indicated that a higher printing force did not increase the depth of penetrated ink to any greater extent. Higher printing force did increase contact between plate and substrate, leading to an improved distribution of the ink. This, in turn, increased print density and decreased UCAs. On closer inspection, the UCAs could be categorized as being induced by steep topographic changes. When appearing at other locations, they were more likely to be caused by poor wetting of the surface. To understand the wetting behavior of the coating surface, observed contact angles were compared with calculated contact angles on surfaces of mixed composition.

EFFECTS OF HEAT--TREAT TEMPERATURE ON MICROSTRUCTURE OF ELECTRO--BRUSH PLATING Ni--P COATINGS

2010 ◽  
Vol 46 (7) ◽  
pp. 867-872 ◽  
Author(s):  
Zhiming LI ◽  
Shiqiang QIAN ◽  
Wei WANG ◽  
Jihua LIU
Keyword(s):  
Heat Treat ◽  
Brush Plating

Various curing conditions for controlling PTFE micro/nano-fiber texture of a bionic superhydrophobic coating surface

2010 ◽  
Vol 119 (1-2) ◽  
pp. 40-47 ◽  
Author(s):  
Zhuangzhu Luo ◽  
Zhaozhu Zhang ◽  
Wenjing Wang ◽  
Weimin Liu ◽  
Qunji Xue
Keyword(s):  
Fiber Texture ◽  
Superhydrophobic Coating ◽  
Curing Conditions ◽  
Coating Surface ◽  
Nano Fiber

Deterioration of Local Mechanical Properties of HVOF-Sprayed Stellite 6 after Exposure to High-Temperature Corrosion

2015 ◽  
Vol 662 ◽  
pp. 115-118 ◽  
Author(s):  
Zdeněk Česánek ◽  
Jan Schubert ◽  
Šárka Houdková ◽  
Olga Bláhová ◽  
Michaela Prantnerová
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
High Temperature Corrosion ◽  
Corrosion Testing ◽  
Time Interval ◽  
Coating Properties ◽  
Operational Conditions ◽  
Stellite 6 ◽  
Coating Surface ◽  
Before And After

Coating properties determine its behavior in operation. The simulation of future operational conditions is therefore the best quality test. The evaluation during operation is usually not possible to perform, and the coatings are therefore frequently characterized by their physical or mechanical properties. This text deals with the high temperature corrosion of HVOF sprayed Stellite 6 coating and with changes of its local mechanical properties before and after the corrosion testing. High temperature corrosion is defined as a corrosion in the presence of molten salts. In this case, the mixture of salts in composition of 59% Na2(SO)4 with 34.5% KCl and 6.5% NaCl was used. Two exposure temperatures 525 °C and 575 °C were selected and the tests for both temperatures were performed in the time interval of 168h in the autoclave. The coating with salt mixture layer was analyzed using scanning electron microscopy and nanoindentation. The high temperature resistance of Stellite 6 coating was evaluated according to the changes in the coating surface and by the occurrence of individual phases formed on the coating surface during the test. Generally, it can be said that the Stellite 6 alloys deposited by HVOF technology show selective oxidation under the salt film. This fact was also proved in this study. Furthermore, the nanoindentation measurements of Stellite 6 coating were performed before and after the corrosion testing. These measurements were used to evaluate the change of local mechanical coating properties.

The influence of substrate absorbency on coating surface chemistry

2002 ◽  
Vol 44 (4) ◽  
pp. 307-315 ◽  
Author(s):  
Hamad Al-Turaif ◽  
Douglas W Bousfield ◽  
Pierre LePoutre
Keyword(s):  
Surface Chemistry ◽  
Coating Surface ◽  
Influence Of Substrate

Droplet rolling angle model of micro-nanostructure superhydrophobic coating surface

2021 ◽  
Vol 44 (2) ◽  
Author(s):  
Jinyu Chen ◽  
Junwu Chen ◽  
Lee Li ◽  
Shengwu Wang ◽  
Yi Xie
Keyword(s):  
Superhydrophobic Coating ◽  
Rolling Angle ◽  
Coating Surface

The effects of parameters on the mechanical properties of Ni-based coatings prepared by automatic brush plating technology

2007 ◽  
Vol 201 (12) ◽  
pp. 5758-5765 ◽  
Author(s):  
Bin Wu ◽  
Bin-shi Xu ◽  
Bin Zhang ◽  
Shi-yun Dong
Keyword(s):  
Mechanical Properties ◽  
Brush Plating
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