Test of the corrosion resistance of medical instruments in a magnesium sulfate solution

1969 ◽  
Vol 3 (5) ◽  
pp. 281-282
Author(s):  
A. A. Danilenko
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Sulfate ◽  
Sulfate Solution ◽  
Medical Instruments ◽  
Magnesium Sulfate Solution

Stress Corrosion of High Performance Hybrid Fibers Reinforced Expansive Concrete Exposed to Magnesium Sulfate Solution

2009 ◽  
Vol 79-82 ◽  
pp. 115-118
Author(s):  
Li Ming Yang ◽  
Hong Fa Yu ◽  
Hai Yan Ma
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Sulfate ◽  
Modulus Of Elasticity ◽  
Dynamic Modulus ◽  
High Performance ◽  
Sulfate Solution ◽  
Hybrid Fibers ◽  
Expansive Concrete ◽  
Combined Action ◽  
Magnesium Sulfate Solution

Deterioration of fly ash concrete (FAC), high performance concrete (HPC), and high performance hybrid fibers reinforced expansive concrete (HPHFREC) subjected to combined action of flexural load and 5% magnesium sulfate solution is investigated. The change of dynamic modulus of elasticity (DME) was monitored and recorded as to observe the corrosion of concrete specimens in magnesium sulfate environment. Results show that in the initial exposure stage, the relative dynamic modulus of elasticity (RDME) of concretes increase steadily as a result of the reinforced effect of flexural load and nucleation of attack products, consequently the microstructure is compacted and the strength of the concretes is enhanced in some extent. As for the later corrosion proceed, the interior cracks occurred and the flexural load accelerated the degradation of concrete. HPC demonstrated good corrosion resistance when it was exposed to only magnesium sulfate solution, and HPHFREC showed the best stress corrosion resistance when it was subjected to combined action of magnesium sulfate solution and flexural load.

scholarly journals Importance of Cation Species during Sulfate Resistance Tests for Alkali-Activated FA/GGBFS Blended Mortars

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3547
Author(s):  
Youngkeun Cho ◽  
Joo Hyung Kim ◽  
Sanghwa Jung ◽  
Yoonseok Chung ◽  
Yeonung Jeong
Keyword(s):  
Compressive Strength ◽  
Magnesium Sulfate ◽  
Sulfate Solution ◽  
Magnesium Ions ◽  
Sulfate Resistance ◽  
Granulated Blast Furnace Slag ◽  
Significant Difference ◽  
Furnace Slag ◽  
Alkali Activated ◽  
Magnesium Sulfate Solution

In this study, the changes in mass, compressive strength, and length of blended mortars were analyzed to investigate their sulfate resistance according to the ground granulated blast furnace slag (GGBFS) blending ratio and type of sulfate solution applied. All alkali-activated mortars showed an excellent sulfate resistance when immersed in a sodium sulfate (Na2SO4) solution. However, when immersed in a magnesium sulfate (MgSO4) solution, different sulfate resistance results were obtained depending on the presence of GGBFS. The alkali-activated GGBFS blended mortars showed a tendency to increase in mass and length and decrease in compressive strength when immersed in a magnesium sulfate solution, whereas the alkali-activated FA mortars did not show any significant difference depending on the types of sulfate solution applied. The deterioration of alkali-activated GGBFS blended mortars in the immersion of a magnesium sulfate solution was confirmed through the decomposition of C–S–H, which is the reaction product from magnesium ions, and the formation of gypsum (CaSO4·2H2O) and brucite (Mg(OH)2).

Sign in / Sign up

Export Citation Format

Share Document