Lack of corrosion of stainless steel instruments in vivo by scanning electron microscope and microprobe analysis

1991 ◽  
Vol 17 (7) ◽  
pp. 346-349 ◽  
Author(s):  
P.D. Eleazer
Keyword(s):  
Stainless Steel ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Microprobe Analysis ◽  
Scanning Electron

scholarly journals Evaluating the Surface Characteristics of Stainless Steel, TMA, Timolium, and Titanium-niobium Wires: An in vivo Scanning Electron Microscope Study

2016 ◽  
Vol 17 (5) ◽  
pp. 372-376 ◽  
Author(s):  
A Laxmi Prasanna ◽  
K Pradeep Babu ◽  
V Naga Keerthi ◽  
Deepika Madathody ◽  
Vidhya Gopinath ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Electron Microscope Study ◽  
Steel Wire ◽  
Surface Characteristics ◽  
Scanning Electron Microscope Study ◽  
Scanning Electron ◽  
Group 1

ABSTRACT Background Recent metallurgical research and advancement in material science has benefited orthodontists in the selection of an appropriate wire size and alloy type, which is necessary to provide an optimum and predictable treatment results. The purpose of the study was to clinically evaluate and compare the surface characteristics of 16 × 22 stainless steel, Titanium molybdenum alloy, timolium, and titanium-niobium before and after placing them in a patient's mouth for 3 months using a scanning electron microscope (SEM). Materials and methods The total sample size was 40, which were divided into four groups (group 1 – stainless steel wires, 10 samples, group 2 – TMA wires, 10 samples, group 3 – timolium wires, 10 samples, and group 4 – titanium-niobium wires, 10 samples), and these were further subdivided into 5 each. The first subgroup of five samples was placed in the patient's mouth and was evaluated under SEM, and another subgroup of five samples was directly subjected to the SEM. Results Scanning electron microscopic evaluation of surface characteristics of unused 16 × 22 rectangular stainless steel wire under 500 × magnification showed an overall smooth surface. Stainless steel wire samples placed in the patient's mouth showed black hazy patches, which may be interoperated as areas of stress. TMA unused wires showed multiple small voids of areas and small craters with fewer elevated regions. The TMA wire samples placed in the patient's mouth showed black hazy patches and prominent ridges, making the wire rougher. Timolium unused archwires showed heavy roughness and voids, whereas wires tested in the patient's mouth showed homogeneous distribution of deep cracks and craters. Unused titanium-niobium archwires showed uniform prominent striations and ridges with occasional voids, whereas wires used in the patient's mouth showed prominent huge voids that could be interpreted as maximum stress areas. Conclusion Stainless steel (group 1) used and unused wires showed smooth surface characteristics when compared with all the other three groups followed by timolium, which was superior to titanium-niobium wires and TMA wires. Clinical significance Timolium wires are superior to titaniumniobium wires and TMA wires. How to cite this article Babu KP, Keerthi VN, Madathody D, Prasanna AL, Gopinath V, Kumar MS, Kumar AN. Evaluating the Surface Characteristics of Stainless Steel, TMA, Timolium, and Titanium-niobium Wires: An in vivo Scanning Electron Microscope Study. J Contemp Dent Pract 2016;17(5):372-376.

Microscopic Study of Smooth Silver-plated Retention Pins in Amalgam

1980 ◽  
Vol 59 (2) ◽  
pp. 124-128 ◽  
Author(s):  
Y. Galindo ◽  
K. McLachlan ◽  
Z. Kasloff
Keyword(s):  
Stainless Steel ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Microscopic Study ◽  
Strong Evidence ◽  
Mechanical Performance ◽  
Silver Layer ◽  
Mechanical Bonding ◽  
Bonding Characteristics ◽  
Scanning Electron

A silver-plating technique was developed in an effort to produce good mechanical bonding characteristics between stainless steelpins and amalgam. Metallographic microscope and scanning electron microscope (SEM) studies were made to assess the presence, or otherwise, of such a bond between (a) the silver layer plating and the surface of the stainless steel pins, and (b) and silver plating and the amalgam. Unplated stainless steel and sterling silver pins were used as a control and as a comparison, respectively. A "rubbing" technique of condensation was devised to closely adapt amalgam to the pins. It is concluded that there is strong evidence for the existence of a good bond between the plated pins and amalgam. The mechanical performance of the bond is discussed elsewhere. 1.

A Study on the Optimization of Solvent Debinding Process for Powder Injection Molded 316L Stainless Steel Parts

2016 ◽  
Vol 1133 ◽  
pp. 324-328 ◽  
Author(s):  
Muhammad Aslam ◽  
Faiz Ahmad ◽  
P.S.M. Bm-Yousoff ◽  
Khurram Altaf ◽  
Afian Omar ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
316L Stainless Steel ◽  
Research Work ◽  
Powder Injection ◽  
Blade Mixer ◽  
Injection Molded ◽  
Debinding Process ◽  
Scanning Electron

Optimization of solvent debinding process parameters for powder injection molded 316L stainless steel (SS) has been reported in this research work. Powder gas atomized (PGA) 316L SS was blended with a multicomponent binder in Z-blade mixer at 170°C ± 5°C for 90 minutes. Feedstock was successfully injected at temperature 170 ± 5°C. Injection molded samples were immersed in n-heptane for 2h, 4h, 6h and 8h at temperatures 50°C ,55°C and 60°C to extract the soluble binder components. Scanning electron microscope (SEM) results attested that soluble binder components were completely extracted from injection molded samples at temperature 55°C after 6h.

Precipitation Characteristics of CaCO3 Scaling on Stainless Steel in Cooling Tower Condition

2012 ◽  
Vol 226-228 ◽  
pp. 1029-1033
Author(s):  
Jian Sheng ◽  
Hua Zhang
Keyword(s):  
Stainless Steel ◽  
Electron Microscope ◽  
Surface Energy ◽  
Scanning Electron Microscope ◽  
Heat Exchangers ◽  
Cooling Tower ◽  
Precipitation Characteristics ◽  
Stainless Steel 304 ◽  
Before And After ◽  
Scanning Electron

Stainless steel 304 and 316 (ss304 and ss316) are widely used in heat exchangers, and the precipitation characteristics of CaCO3 is the first step to research anti-fouling technology. CaCO3 scaling precipitated on coupons from 1.0mmol/l CaCO3 solution at 35°C. By weighing the coupons before and after static reaction experiments to get the mass of scaling and the morphology was taken by Scanning Electron Microscope (SEM). The results show that at the same condition there is more fouling on ss304 than ss316. Higher pH not only promotes square aragonite and calcite and square aragonite gradually recrystallize to calcite but also makes both homogeneous and heterogeneous nucleation rate increasing, and the former increases more, so the fouling mass is bigger at lower pH than higher pH; fouling grows at the place with higher surface energy first and then extend to surrounding place, and when the number increases and crystals grow big and connect each other to form fouling layer.

Surface and corrosion properties of Type 430 ferritic stainless steel in parsley (Petroselinum Sativum) essential oil-containing sulphuric acid solution

2021 ◽  
Author(s):  
Omotayo Sanni ◽  
Jianwei Ren ◽  
Tien-Chien Jen
Keyword(s):  
Stainless Steel ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Essential Oils ◽  
Sulphuric Acid ◽  
Ferritic Stainless Steel ◽  
Stainless Steel Surface ◽  
Corrosion Properties ◽  
Surface Protection ◽  
Scanning Electron

Abstract This study examined the corrosion inhibiting properties of parsley (petroselinum sativum) essential oils, for Type 430 ferritic stainless steel in 0.5 molar sulphuric acid solutions. In this study, weight loss, electrochemical and scanning electron microscope techniques were used in gaining a detailed understanding of inhibition effects of parsley (petroselinum sativum) essential oils (PEO) on Type 430 ferritic stainless steel corrosion. The inhibitor studied exhibits good anti-corrosion performance with 98.65 % inhibition efficiency. This result could be ascribed to the adsorbed PEO on the surface of the stainless steel, and this was verified by surface visualization using optical and scanning electron microscope techniques while the crystallographic variation of the inhibited sample is studied by X-ray diffraction (XRD). The adsorption of PEO onto stainless steel surface is controlled by Langmuir adsorption isotherms. Optical images of non-inhibited specimens showed a severely corroded surface with a visible macro pit on the stainless steel from sulphuric solutions. The inhibited sample shows improved surface owing to the surface protection effect of PEO molecules. The corrosion inhibition performance of PEO is due to the presence of active constituents which enhanced the film formation over the surface of the metal, thus, mitigating corrosion.

Sign in / Sign up

Export Citation Format

Share Document