Treatment of water treatment hanging tablets
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Hello, teachers. When testing the slow-release effect of circulating cooling water, carbon steel, copper, and stainless steel test coupons are used. If these coupons corrode severely, a cleaning solution is required for cleaning. What are the standards for this cleaning agent, or in which specifications can such information be found?
The cleaning of water treatment hanging plates is primarily intended to remove corrosion products and scale. Generally, there are no specific standards, but an appropriate cleaning agent can be selected based on the type of material and the degree of corrosion. Acidic cleaners (such as hydrochloric acid or sulfuric acid solutions) can generally be used to remove scale and rust, but it should be noted that acidic cleaners may cause secondary corrosion to the metal. When using it, the concentration, temperature, and time must be carefully controlled; after cleaning, thorough neutralization and rinsing are necessary to prevent residual corrosion. Some industry standards or **norms may include recommendations or specifications regarding cleaning agents to be used in specific environments; it is possible to consult relevant standards and guidelines in the fields of environmental protection, chemistry, or water treatment. .
This post was last edited by qugd on 2024-1-6 at 15:10. If the corrosion on the plate is severe, it’s necessary to examine the condition of the corroded surface. If the corrosion is very uniform, simply wash it with water and then polish it until it is shiny. If corrosion has caused some scarring, it’s time to replace the hanging plates. They aren’t expensive, and they are considered consumable items anyway.
For the cleaning of specimens after Hanging piece corrosion, JB/T6074 \"Preparation, Cleaning, and Evaluation of Corrosion Specimens\" can be referred to.
On Baidu, it is generally stated that for carbon steel test pieces, a mixture of hexamethylenetetramine and hydrochloric acid is used; for stainless steel test pieces, a mixture of hexamethylenetetramine and nitric acid is used; and for copper test pieces, 15-20% hydrochloric acid is used as the cleaning agent. I’m not sure which standard or specification this comes from