Dear sea friends, what is a corrosion inhibitor?
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Today, my supervisor suddenly asked me what a corrosion inhibitor is. I wasn’t able to answer clearly, so I hope those who are more knowledgeable in this area can give me some guidance; I don’t know much about it! Thank you
I know it’s based on the same principle; I want to know the composition of the corrosion inhibitor.
http://www.docin.com/p-50778855.html This article explains the principles, functions, and classifications of corrosion inhibitors. Below is the procedure for preparing corrosion inhibitors for circulating water: Phosphate Buffer (PB). Reagents: NaH2PO4·2H2O, Na2HPO4·12H2O. Preparation method: Typically, 0.2mol/L solutions of NaH2PO4 and 0.2mol/L solutions of Na2HPO4 are first prepared; these two are then mixed in a certain ratio to obtain a 0.2mol/L phosphate buffer (PB). Buffers with different concentrations can be prepared as needed. (1) 0.2 mol/L Na2HPO4 ； Weigh 31.2 g of NaH2PO4·2H2O (or 27.6 g of NaH2PO4·H2O), add distilled water to bring the volume to 1000 ml, and dissolve it. (2) 0.2 mol/L Na2HPO4: Weigh 71.632 g of Na2HPO4·12H2O (or 53.6 g of Na2HPO4·7H2O, or 35.6 g of Na2HPO4·2H2O), add distilled water to bring the volume to 1000 ml, and then dissolve it. (3) Preparation of 0.2 mol/L PB at pH 7.4: Take 19 ml of 0.2 mol/L NaH2PO4 and 81 ml of 0.2 mol/L Na2HPO4·12H2O, and mix them thoroughly to obtain 0.2 mol/L PB (with a pH of approximately 7.4–7.5). If the pH is too high or too low, it can be adjusted by changing the ratio of the two, and it can be stored at room temperature. 0.2 mol/L phosphate buffer (pH 5.7–8.0): For a pH of 5.7: 0.2 mol/L NaH2PO4 – volume; 0.2 mol/L Na2HPO4 – volume. For pH 6.5: 5.7 ml; 93.5 ml. For pH 6.8: 6.5 ml; 5.8 ml. For pH 7.0: 92.0 ml; 92.0 ml. For pH 8.0: 8.0 ml; 10.0 ml. For pH 5.9: 90.0 ml; 90.0 ml. For pH 6.0: 10.0 ml; 87.7 ml. For pH 6.1: 87.7 ml; 12.3 ml. For pH 6.2: 85.0 ml; 15.0 ml. For pH 6.3: 81.5 ml; 18.5 ml. For pH 6.4: 77.5 ml; 22.5 ml. For pH 6.5: 73.5 ml; 26.5 ml. For pH 6.6: 68.5 ml; 31.5 ml. For pH 6.7: 62.5 ml; 37.5 ml. For pH 6.8: 56.5 ml; 43.5 ml. For pH 6.9: 51.0 ml; 49.0 ml. For pH 7.0: 45.0 ml; 55.0 ml. For pH 7.1: 39.0 ml; 61.0 ml. For pH 7.2: 33.0 ml; 67.0 ml. For pH 7.3: 28.0 ml; 72.0 ml. For pH 7.4: 23.0 ml; 67.0 ml. For pH 7.5: 19.0 ml; 81.0 ml. For pH 7.6: 16.0 ml; 84.0 ml. For pH 7.7: 13.0 ml; 87.0 ml. For pH 7.8: 10.5 ml; 89.5 ml. For pH 7.9: 8.5 ml; 91.5 ml. For pH 8.0: 7.0 ml; 93.0 ml. 0.01 MPBS buffer: Weigh 8 g of NaCl, 0.2 g of KCl, 3.63 g of Na2HPO4•12H2O, or 1.44 g of Na2HPO4, 0.24 g of KH2PO4. Dissolve these substances in 900 ml of double-distilled water, adjust the pH to 7.4 using hydrochloric acid, and then bring the volume to 1 L. Store at room temperature for later use.