Who has seen preservation using frozen saline like this?
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Sodium chromate in increased concentration works well; purchasing it requires complicated approval procedures, and it is highly toxic, but it offers good value for money. Add 3.2 kilograms of sodium chloride per cubic meter; the pH level should be between 8 and 9. If this level is not achieved, sodium hydroxide can be added. For calcium chloride, simply divide the amount by 2. Sodium dichromate is effective as well, but it requires approval to purchase and is highly toxic; however, it offers good cost-performance. Add 3.2 kilograms of sodium chloride per cubic meter; the pH level should be between 8 and 9. If this level is not achieved, sodium hydroxide can be added. For calcium chloride, simply divide the amount by 2. Sodium dichromate is effective as well, but it requires approval to purchase and is highly toxic; however, it offers good cost-performance. Add 3.2 kilograms of sodium chloride per cubic meter; the pH level should be between 8 and 9. If this level is not achieved, sodium hydroxide can be added. For calcium chloride, simply divide the amount by 2. Has anyone ever seen corrosion inhibitors being added to such frozen saltwater solutions to prevent equipment corrosion? What is the effectiveness of this approach? Sodium chromate in increased concentration is used as a corrosion inhibitor. Add 3.2 kilograms of sodium chloride per cubic meter; the pH level should be between 8 and 9. If this level is too low, sodium hydroxide can be added. For calcium chloride, simply divide the amount by 2.
Isn’t your pH value of 8 to 9 a bit high? As for what you mentioned about adding sodium dichromate as a corrosion inhibitor, it is actually mainly sodium dichromate itself, which possesses certain oxidizing properties and is used to adjust the pH level
Sodium dichromate is the most common corrosion inhibitor for cryogenic brine
This post was last edited by Wang Genrong on 2014-5-6 at 21:56. Our company specializes in the production of brine corrosion inhibitors, with a corrosion inhibition rate of over 98%; these inhibitors can be used for hanging plate tests.
Is there a rule stating that its use is prohibited?