Effect of Phosphorus and Nickel on Electrochemical Migration of Sn-3Ag-0.7Cu Solder Paste in Simulated Body Fluid

2018 ◽  
Vol 273 ◽  
pp. 61-65 ◽  
Author(s):  
Norinsan Kamil Othman ◽  
Emee Marina Salleh ◽  
C. Sarveswaran ◽  
Fakhrozi Che Ani
Keyword(s):  
Corrosion Resistance ◽  
Simulated Body Fluid ◽  
Body Fluid ◽  
Water Drop ◽  
Electrochemical Migration ◽  
Time To Failure ◽  
Solder Paste ◽  
Water Drop Test ◽  
Sbf Solution ◽  
Mean Time

Electrochemical migration (ECM) behaviour of Sn-3Ag-0.7Cu and Sn-3Ag-0.7Cu-0.03P-0.005Ni solder alloys were investigated using simulated body fluid (SBF) solution. In electronic devices, ECM phenomenon potentially leads to incompetence or failure of the whole devices. According to water drop test (WDT), mean-time-to-failure (MTTF) of commercially used Sn-3Ag-0.7Cu solder alloy was prolonged with addition of phosphorus (P) and nickel (Ni) as alloying elements. According to microstructure of each solder paste alloy which was observed using field emission scanning electron microscope (FESEM), dendrite structure in Sn-3Ag-0.7Cu-0.03P-0.005 Ni solder was lesser than in plain the Sn-3Ag-0.7Cu. This phenomenon suggested that presence of P and Ni retarded the growth of dendritic thus improved its corrosion resistance. Therefore, Sn-3Ag-0.7Cu-0.03P-0.005Ni possessed a good corrosion resistance in SBF medium.

Polymethylhydrosiloxane Coating Enhanced Corrosion Resistance of Hydrofluoric Acid Treated Mg Bio-implant Material in Simulated Body Fluid Solution

2019 ◽  
Vol 9 (1) ◽  
pp. 41-49
Author(s):  
Manjubala Bharti ◽  
Ranjan K Sahu
Keyword(s):  
Corrosion Resistance ◽  
Simulated Body Fluid ◽  
Hydrofluoric Acid ◽  
Body Fluid ◽  
Acid Treatment ◽  
Simulated Body Fluid Solution ◽  
Fluid Solution ◽  
Electrochemical Test ◽  
Sbf Solution

Background: Deceleration of the corrosion rate of Mg by surface chemical method via hydrofluoric acid treatment has a special interest because it is a simple, cost-effective, and efficient method for the coating of interior as well as the exterior part of any size and shape of implant material. However, conversion coating by hydrofluoric acid treatment fails to produce a long-term stable coating of Mg in ionic solutions caused by the formation of cracks on the surface during the process. Consequently, the corrosive ions of the SBF solution enter through the cracks that accelerate the dissolution by local galvanic corrosion. On the above view, we aim to develop a simple strategy for enhancement of corrosion resistance of the hydrofluoric acid treated Mg bioimplant material. Methods: This method is comprised of dip coating of hydrofluoric acid treated Mg sample in the polymethylhydrosiloxane followed by curing at 170°C for 30 min. The samples were characterized by electron probe microanalysis, X-ray photoelectron spectroscopy and electrochemical test. Results: The electrochemical test results reveal that the corrosion rate of the coated Mg sample in the simulated body fluid solution is decreased by more than 8500 times than the bare sample. The long term immersion data indicate that the chemical resistance of the coated Mg sample in the SBF solution even after 25 days is better than the bare Mg metal. Conclusion: Polymethylhydrosiloxane coating is efficient to enhance the corrosion resistance of hydrofluoric acid treated Mg metal in simulated body fluid solution.

scholarly journals Electrochemical Migration Inhibition of Tin by Disodium Hydrogen Phosphate in Water Drop Test

Metals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 942
Author(s):  
Bokai Liao ◽  
Hong Wang ◽  
Shan Wan ◽  
Weiping Xiao ◽  
Xingpeng Guo
Keyword(s):  
Bias Voltage ◽  
Water Drop ◽  
Inhibitory Effect ◽  
Electrochemical Migration ◽  
Time To Failure ◽  
Protective Film ◽  
Pitting Potential ◽  
Low Concentrations ◽  
High Concentrations ◽  
Mean Time

The inhibition effect of Na2HPO4 on the electrochemical migration (ECM) of pure tin was investigated by means of water drop testing and surface characterizations. The effects of concentration of Na2HPO4 and applied direct current (DC) bias voltage on the ECM were also studied. Results showed that the mean time to failure caused by ECM decreased with the increasing bias voltage. Upon addition of relative high concentrations of Na2HPO4, Na2HPO4 can react with metallic tin or tin ions to form a protective film on the surface of anode and increase the pitting potential. The rate of anodic dissolution can be slowed down and thus ECM of tin was retarded. Fractal-like dendrites formed after ECM tests in the absence and presence of low concentrations of Na2HPO4 mainly consisted of tin elements. Relevant reactions were proposed to explain the inhibitory effect of Na2HPO4 on the ECM of tin.

Investigation of corrosion behavior of polypyrrole-coated Ti using dynamic electrochemical impedance spectroscopy (DEIS)

RSC Advances ◽  
2016 ◽  
Vol 6 (83) ◽  
pp. 80275-80285 ◽  
Author(s):  
Bhavana Rikhari ◽  
S. Pugal Mani ◽  
N. Rajendran
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Simulated Body Fluid ◽  
Corrosion Behavior ◽  
Body Fluid ◽  
Electrochemical Impedance ◽  
Sbf Solution ◽  
Dynamic Electrochemical Impedance Spectroscopy

In the present work, dynamic electrochemical impedance spectroscopy (DEIS) was used to investigate the corrosion behavior of polypyrrole (PPy)-coated titanium (Ti) in simulated body fluid (SBF) solution.

Evaluation of the Bioactivity Behavior of a 48 Wt %SiO2 Bioglass through Experiments in Simulated Body Fluid

2012 ◽  
Vol 727-728 ◽  
pp. 1238-1242 ◽  
Author(s):  
Roger Borges ◽  
Antônio Carlos da Silva ◽  
Juliana Marchi
Keyword(s):  
Corrosion Resistance ◽  
Surface Layer ◽  
Simulated Body Fluid ◽  
Body Fluid ◽  
Glass Network ◽  
In Vitro Experiments ◽  
High Corrosion Resistance ◽  
Before And After ◽  
O 19

Among bioceramics materials, bioglasses which exhibits either a bioactive or resorbable behavior has been studied for many applications, such as bone substitutive and regeneration. When in contact with body fluid, the bioglasses can induce the formation of a hydroxyapatite surface layer. In this paper, we studied the bioactivity of a bioglass containing 48 wt %SiO2, 27 wt% Na2O, 19 wt % CaO and 6 wt %P2O5. After fusion and annealing, the samples were immersed in SBF for different periods, up to 14 days. The samples were characterized through XRD, DRIFT and SEM before and after bioactivity experiments. The overall results suggest the formation of a surface layer of consisting of hydroxyapatite, which was crystallized within seven days after in vitro experiments, leading to a suitable bioactivity. Moreover, the samples showed a glass network with high cohesion due to calcium addition, leading to materials with high corrosion resistance.

scholarly journals Bioactivity Behavior Evaluation of PCL-Chitosan-Nanobaghdadite Coating on AZ91 Magnesium Alloy in Simulated Body Fluid

Coatings ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 231
Author(s):  
Farzad Soleymani ◽  
Rahmatollah Emadi ◽  
Sorour Sadeghzade ◽  
Fariborz Tavangarian
Keyword(s):  
Simulated Body Fluid ◽  
Corrosion Rate ◽  
Composite Coating ◽  
Body Fluid ◽  
Composite Coatings ◽  
Phosphate Buffer Solution ◽  
Az91 Alloy ◽  
Apatite Formation ◽  
Az91 Magnesium Alloy ◽  
Sbf Solution

Polymer–ceramic composite coatings on magnesium-based alloys have attracted lots of attention in recent years, to control the speed of degradability and to enhance bioactivity and biocompatibility. In this study, to decrease the corrosion rate in a simulated body fluid (SBF) solution for long periods, to control degradability, and to enhance bioactivity, polycaprolactone–chitosan composite coatings with different percentages of baghdadite (0 wt.%, 3 wt.%, and 5 wt.%) were applied to an anodized AZ91 alloy. According to the results of the immersion test of the composite coating containing 3 wt.% baghdadite in a phosphate buffer solution (PBS), the corrosion rate decreased from 0.45 (for the AZ91 sample) to 0.11 mg/cm2·h after seven days of immersion. To evaluate the apatite formation capability of specimens, samples were immersed in an SBF solution. The results showed that the samples were bioactive as apatite layers formed on the surface of specimens. The composite coating containing 3 wt.% baghdadite showed the highest apatite-formation capability, with a controlled release of ions, and the lowest corrosion rate in the SBF.

Investigation of corrosion on SAC 305, SAC 0307 and SAC 0307-0.03 P-0.005 Ni solder paste alloys in simulated body fluid (SBF)

2017 ◽  
Author(s):  
C. Sarveswaran ◽  
Emee Marina Salleh ◽  
A. Jalar ◽  
Z. Samsudin ◽  
M. Yusuf Tura Ali ◽  
...  
Keyword(s):  
Simulated Body Fluid ◽  
Body Fluid ◽  
Solder Paste

scholarly journals Biomimetic Coating of Modified Titanium Surfaces with Hydroxyapatite Using Simulated Body Fluid

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Mohsin Nazir ◽  
Ong Pei Ting ◽  
Tan See Yee ◽  
Saravanan Pushparajan ◽  
Dasan Swaminathan ◽  
...  
Keyword(s):  
Simulated Body Fluid ◽  
Tricalcium Phosphate ◽  
Body Fluid ◽  
Energy Dispersive Spectrometer ◽  
Pure Titanium ◽  
Commercially Pure Titanium ◽  
Phosphate Coatings ◽  
Infrared Spectrometer ◽  
Sbf Solution ◽  
The Fourier Transform

This study investigated the viability of coating commercially pure titanium (CPTi) surfaces, modified via sandblasting and acid etching, with hydroxyapatite (HA)/tricalcium phosphate coatings using a simulated body fluid (SBF) solution. The samples were immersed in SBF from 3 to 7 days. The morphology and the chemistry of the HA/tricalcium phosphate coating were then analysed. Prior to immersion in SBF, the samples were sandblasted and acid etched to mimic the morphology and roughness of commercially available dental implants. The SBF aided in the formation of crystalline HA/tricalcium phosphate coatings on all the samples. The coatings were uniform and had roughness values higher than the underlying substrate. The highest roughness values for the coatings on the surfaces were obtained at 7 days of immersion in SBF with averageSavalues of 2.9 ± 0.2 µm. The presence of HA/tricalcium phosphate on the surfaces was confirmed by the Scanning Electron Microscope (SEM), Energy Dispersive Spectrometer (EDS), the X-Ray Diffraction (XRD), and the Fourier Transform Infrared Spectrometer (FTIR) analysis. This study shows that it is possible to obtain an adequate and uniform hydroxyapatite coating on pure titanium substrates in a shorter period of time with characteristics that favour the ultimate goal of implants therapy, that is, osseointegration.

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