Dissertation > Excellent graduate degree dissertation topics show

Study on Sulfuric Acid Pickling Inhibitor Extracted from Bamboo Leaves

Author: ZhengXingWen
Tutor: GongMin
School: Sichuan Institute of Technology
Course: Applied Chemistry
Keywords: Corrosion Inhibitor Bamboo leaves Sulfuric acid Carbon steel Synergistic Effect
CLC: TG174.42
Type: Master's thesis
Year: 2009
Downloads: 147
Quote: 3
Read: Download Dissertation

Abstract


In this paper, bamboo leaves as raw material the preparation environment friendly sulfuric acid pickling inhibitor, comparative analysis of a variety of extraction methods, research on bamboo leaves extract inhibition efficiency of the extraction method; through the weight loss method, electrochemical method bamboo leaf extract and potassium iodide compound corrosion performance and Inhibition Mechanism of the research and the analysis of the surface; preliminary study by separating the bamboo leaf extract effective Inhibition ingredients; Extraction of comprehensive utilization of bamboo leaves through a step-by-step feasibility. Extraction Method: inhibitor extracted from bamboo leaves with acid soaking method is the most economical and applicable method. Optimum Extraction Condition: 15% sulfuric acid soaked bamboo leaves 5h preparation of bamboo leaf quality with 15% sulfuric acid volume ratio of 1g: 10mL solution, and its inhibition efficiency of 96% or more. The study showed that: (1) Bamboo leaf extract can inhibit the cathodic reaction of carbon steel in sulfuric acid and anodic reaction is a mixed-type inhibitor mechanism of action to cover the effect of bamboo leaves extract. (2) the increase of the bamboo leaf extract concentration, the inhibition efficiency increases, the desorption potential shifts; inhibition efficiency decreased with increasing temperature, the the desorption potential negative shift. (3) bamboo leaf extract in the adsorption of carbon steel surface in accordance with El-Awady between the model and the Flory-Huggins adsorption isotherm. (4) surface analysis found: The active ingredients of bamboo leaf extract chemical adsorption on the electrode surface occurs, significant inhibition of corrosion of carbon steel in sulfuric acid; soaked in sulfuric acid system containing bamboo leaf extract corrosion of carbon steel surface Copper Enrichment phenomenon occurred. The complex research shows that: (1) bamboo leaf extract there are obvious synergies with 0.001mol / L of potassium iodide, compounding inhibition efficiency of 98% or more, and can inhibit the cathodic reaction of carbon steel in sulfuric acid solution and anodic reaction is a mixed type inhibitor, the effect of the mechanism of action for the coverage. (2) bamboo leaf extract mixed with potassium iodide, the desorption potential further positive shift of the corrosion potential shifted negatively increase the role of regional inhibitor, to improve corrosion inhibitor adsorption stability. (3) complex with the inhibition efficiency increases with increasing concentration, changes very little with increasing temperature. (4) bamboo leaf extract with potassium iodide in carbon steel joint surface adsorption staggered adsorption model, in line with the carbon steel surface adsorption El-Awady between the model and the Flory-Huggins adsorption isotherm equation. (5) surface analysis found that the addition of potassium iodide to promote bamboo leaf extract active ingredients of adsorption on the electrode surface, significant inhibition of corrosion of carbon steel in sulfuric acid. Of bamboo leaf extract preliminary separation, three isolates, electrochemical test of bamboo leaf extract INHIBITION mainly by the separation material and isolate 3 contribution to the separation of complex 1 corrosion performance is weak, and separate object 2 and the separator 3, there is a synergistic effect. Combining the results of the previous experiment, initially speculated bamboo leaf extract effective inhibition component is an organic acid and salts thereof, anthraquinone, amino acids and alkaloids, etc., and the effective inhibition ingredients synergistic effect is present, but to be further confirmed. Comprehensive extraction of bamboo leaves, respectively, polysaccharides, chlorophyll, flavonoids and sulfuric acid leaching solution. Measured polysaccharide extraction rate of 1.27%, the chlorophyll extraction rate was 3.94%, flavonoids extraction rate of 0.24%, the comprehensive extraction sulfuric acid leach solution of inhibition efficiency of 89.55%, mixed with 0.001mol/LKI, up to 97.71%.

Related Dissertations

  1. Effect of Reinforcing Materials on the Properties of Nitrile Butadiene Rubber,TQ333.7
  2. Human glioblastoma resveratrol metabolites and metabolizing enzymes expression analysis,R739.4
  3. Research on Implicit and Explicit Instruction in Senior High School English Classes,G633.41
  4. Study of the Effects of CD59, CD55 on Lipid Rafts-mediated Singnal Transduction of T Cell,R392.12
  5. Cold Rolling Process Optimizing on Structural Carbon Steel,TG335.12
  6. Study on Reinforced Acid Leaching of Ferric Iron in Pyrite Cinder,X756
  7. The Effect of the Damage Caused by Loudonta Dispar on the Content of the Secondary Substance and Nutritient Substance of Phyllostachys Heterocycla Cv. Pubescens,S763.7
  8. The bamboo leaves gypsum decoction for treatment of patients with malignant yin fever retrospective study,R273
  9. Pyrite residue desulfurization and arsenic,X705
  10. Studies on Polysilicic Acid-polyferric Flocculant for Papermaking Wastewater Treatment,X793
  11. The Research on the Technology of Dissolvable Chewing Gum of Bamboo Shoots,TS246.5
  12. Research on Microwave Assisted Sulphuric Acid Leaching of Nickel and Cobalt from Low Grade Laterite Ore,TF815
  13. Modification of high titanium slag leaching of acid hydrolysis,TF823
  14. Xuanhua Steel the BOF efficient dephosphorization new technology,TF713.3
  15. Electrochemical Distribution Characteristics of Corrosion Behavior of Carbon Steel Immersed in Seawater,TG172.5
  16. Electrochemical corrosion inhibitor for carbon steel corrosion resistance role in the acidic medium,TG174.42
  17. Study on the Corrosion-Preventing Efficiency and Synergistic Action of PhAMT,TG174.42
  18. Corrosion Mechanism and Preventive Measurements of Sulfuric Acid Making Plant,TG172.6
  19. Synthesis of Dissymmetric Bis-quaternary Ammonium with Imidazoline Ring and Study on Inhibitory Performance,TG174.42
  20. An Investigation on Dephosphorization of High Phosphorous Iron Ore by Biomass Reduation Roasting and Magnetization of Pyrite Cinder,TD951
  21. Enzymatic Transesterification for Biodiesel Production from Chinese Kernel Oil,TE667

CLC: > Industrial Technology > Metallurgy and Metal Craft > Metallurgy and Heat Treatment > Metal corrosion protection,metal surface treatment > Corrosion control and protection > Metal surface protection technology > Metal preservatives,corrosion inhibitors
© 2012 www.DissertationTopic.Net  Mobile