Protection against biogenic sulfuric acid corrosion—development of a sprayed polymer concrete

2015 ◽  
pp. 106-106
Author(s):  
Robert Schulte Holthausen ◽  
Michael Raupach
Keyword(s):  
Sulfuric Acid ◽  
Acid Corrosion ◽  
Polymer Concrete ◽  
Sulfuric Acid Corrosion

scholarly journals Mechanical Properties and Resistance to Acid Corrosion of Polymer Concrete Incorporating Ceramsite, Fly Ash and Glass Fibers

Materials ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2441 ◽  
Author(s):  
Yinong Shen ◽  
Bo Liu ◽  
Jianfu Lv ◽  
Manlin Shen
Keyword(s):  
Compressive Strength ◽  
Sulfuric Acid ◽  
Fly Ash ◽  
Flexural Strength ◽  
Glass Fiber ◽  
Acid Corrosion ◽  
Glass Fibers ◽  
Polymer Concrete ◽  
Sulfuric Acid Corrosion ◽  
The Cost

A novel polymer concrete (PC) using an aggregate of ceramsite, fly ash and glass fiber was created. Specimens were used in experiments to investigate its anticorrosion properties to determine the viability of its use in flue gas desulfurization (FGD) stacks. The inclusion of ceramsite reduces both the weight and the cost of the material. The effects of ceramsite and glass fiber on the flexural strength and compressive strength of the concrete were investigated. The experimental results showed that ceramsite reduces the flexural strength and the compressive strength of the concrete, but that the glass fiber increases both. Surface resistance to sulfuric acid corrosion and the microstructure of the corroded concrete were investigated. Specimens of the novel PC and the control PC strongly resisted acid corrosion. Although the specimen surfaces deteriorated, the interior structure of the PC was unaffected after 50 days of acid immersion. Processes by which sulfuric acid corrodes PC surfaces were determined.

scholarly journals Resistance to Sulfuric Acid Corrosion of Geopolymer Concrete Based on Different Binding Materials and Alkali Concentrations

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7109
Author(s):  
Wei Yang ◽  
Pinghua Zhu ◽  
Hui Liu ◽  
Xinjie Wang ◽  
Wei Ge ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Corrosion Resistance ◽  
Sulfuric Acid ◽  
Fly Ash ◽  
Acid Corrosion ◽  
Geopolymer Concrete ◽  
High Calcium ◽  
High Calcium Fly Ash ◽  
Naoh Solution ◽  
Sulfuric Acid Corrosion

Geopolymer binder is expected to be an optimum alternative to Portland cement due to its excellent engineering properties of high strength, acid corrosion resistance, low permeability, good chemical resistance, and excellent fire resistance. To study the sulfuric acid corrosion resistance of geopolymer concrete (GPC) with different binding materials and concentrations of sodium hydroxide solution (NaOH), metakaolin, high-calcium fly ash, and low-calcium fly ash were chosen as binding materials of GPC for the geopolymerization process. A mixture of sodium silicate solution (Na2SiO3) and NaOH solution with different concentrations (8 M and 12 M) was selected as the alkaline activator with a ratio (Na2SiO3/NaOH) of 1.5. GPC specimens were immersed in the sulfuric acid solution with the pH value of 1 for 6 days and then naturally dried for 1 day until 98 days. The macroscopic properties of GPC were characterized by visual appearance, compressive strength, mass loss, and neutralization depth. The materials were characterized by SEM, XRD, and FTIR. The results indicated that at the immersion time of 28 d, the compressive strength of two types of fly ash-based GPC increased to some extent due to the presence of gypsum, but this phenomenon was not observed in metakaolin-based GPC. After 98 d of immersion, the residual strength of fly ash based GPC was still higher, which reached more than 25 MPa, while the metakaolin-based GPC failed. Furthermore, due to the rigid 3D networks of aluminosilicate in fly ash-based GPC, the mass of all GPC decreased slightly during the immersion period, and then tended to be stable in the later period. On the contrary, in metakaolin-based GPC, the incomplete geopolymerization led to the compressive strength being too low to meet the application of practical engineering. In addition, the compressive strength of GPC activated by 12 M NaOH was higher than the GPC activated by 8 M NaOH, which is owing to the formation of gel depended on the concentration of alkali OH ion, low NaOH concentration weakened chemical reaction, and reduced compressive strength. Additionally, according to the testing results of neutralization depth, the neutralization depth of high-calcium fly ash-based GPC activated by 12 M NaOH suffered acid attack for 98 d was only 6.9 mm, which is the minimum value. Therefore, the best performance was observed in GPC prepared with high-calcium fly ash and 12 M NaOH solution, which is attributed to gypsum crystals that block the pores of the specimen and improve the microstructure of GPC, inhibiting further corrosion of sulfuric acid.

Biogenic sulfuric acid corrosion resistance of new artificial reef concrete

2018 ◽  
Vol 158 ◽  
pp. 33-41 ◽  
Author(s):  
Yu Yang ◽  
Tao Ji ◽  
Xujian Lin ◽  
Caiyi Chen ◽  
Zhengxian Yang
Keyword(s):  
Corrosion Resistance ◽  
Sulfuric Acid ◽  
Acid Corrosion ◽  
Artificial Reef ◽  
Sulfuric Acid Corrosion

Experiment Study on Degradation Laws of Sulfuric Acid Corrosion Reinforcements

2018 ◽  
Vol 878 ◽  
pp. 23-27 ◽  
Author(s):  
Ming Qiang Lin ◽  
Feng Juan Dai ◽  
Jia Tao Li
Keyword(s):  
Sulfuric Acid ◽  
Acid Corrosion ◽  
Constitutive Models ◽  
Corrosion Damage ◽  
Uniform Corrosion ◽  
Steel Bars ◽  
Relationship Model ◽  
Strain Relationship ◽  
Sulfuric Acid Corrosion ◽  
Corrosion Of Steel

The corrosion of concrete structures is serious in sulfuric acid environments. Corrosion damage of reinforcements caused sulfuric acid corrosion is very serious. The rapid experiments of sulfuric acid corrosion steel bars were carried out, and the apparent morphology and mechanical properties of sulfuric acid corrosion steel bars were studied. The results show that the corrosion of steel bars is uniform corrosion. With the increase of corrosion rate, the yield platforms and the yield strengths and ultimate strengths are reduced. Based on the experimental datas, the relationship models between yield strengths and ultimate strengths and corrosion rates were obtained. The constitutive models of corrosion steel bars were established. The stress - strain relationship model is in good agreement with the experimental data.

Chemical, microbiological, and in situ test methods for biogenic sulfuric acid corrosion of concrete

2000 ◽  
Vol 30 (4) ◽  
pp. 623-634 ◽  
Author(s):  
J Monteny ◽  
E Vincke ◽  
A Beeldens ◽  
N De Belie ◽  
L Taerwe ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Acid Corrosion ◽  
Test Methods ◽  
In Situ Test ◽  
Sulfuric Acid Corrosion

Investigations of Sulfuric Acid Corrosion of Concrete. II: Electrochemical and Visual Observations

2001 ◽  
Vol 127 (7) ◽  
pp. 580-584 ◽  
Author(s):  
F. Jahani ◽  
J. Devinny ◽  
F. Mansfeld ◽  
I. G. Rosen ◽  
Z. Sun ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Acid Corrosion ◽  
Sulfuric Acid Corrosion ◽  
Visual Observations
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