Causes of blackening of corner groove, how to clean black corner groove

Mar 13, 2026 PipesB2B Marketplace
One. What are the reasons for blackening on the corner profile?The blackening of the corner groove may be due to a thick layer of oil and dirt covering the surface. This dirt attracts dust, making the corner groove appear dark. Additionally, oxidation of

One. What are the reasons for blackening on the corner profile?

The blackening of the corner groove may be due to a thick layer of oil and dirt covering the surface. This dirt attracts dust, making the corner groove appear dark. Additionally, oxidation of the corner groove can also cause it to darken.

Two. How to clean black edges


1. Clean with a cleaning agent to remove oil stains.

Detergents have emulsifying properties that are effective for removing oil stains. For stained corners, a detergent can be applied with a clean cotton cloth to effectively remove the oil.

2、Remove oil stains with soap.

Besides detergents, soap is also an excellent cleaning and degreasing agent. Wet a cotton cloth and repeatedly rub it against the soap, and the soap will adhere to the cloth. Then, use the soap-covered cloth to wipe the corners of the valve; the grease will quickly be removed.

3、All-purpose toothpaste for removing grease

Besides cleaning teeth, toothpaste can also remove stubborn stains from shoes and clothing, including those on cornflower petals. Apply toothpaste to a soft-bristled toothbrush and gently brush the cornflower petals to remove the oil stains.

4、Use glass cleaner to remove grease and dirt.

Glass cleaners are commonly used to clean windows and car windshields. However, glass cleaners are also effective for cleaning metal products. Apply the glass cleaner to the faucet, wait a few minutes, and then wipe it clean with a cotton cloth. The cleaning solution will quickly remove the oil and dirt from the faucet.

5、Remove the oxidation layer using lemon juice.

For another oxidation phenomenon that causes blackening of corner edges, a solution is available using lemons. Cut fresh lemons into slices and use the lemon slices to rub the oxidized, black areas on the corner edges. The blackening will gradually disappear.

6、High-performance wax polishing

Oxidized corners can also be polished with wax, Prepare a piece of cotton cloth, apply the polishing wax to the corners, and then repeatedly polish with the cotton cloth, the oxidized corners will quickly regain their shine.

7、Stainless steel polishing cleaning agent polishing

Because many household corner profiles are made of stainless steel, if you don't have polishing wax, you can use a stainless steel cleaning agent instead. Prepare a piece of cotton cloth, pour some stainless steel cleaning agent onto the cloth, and use the cloth to polish the oxidized corner profiles. The oxidized black layer will soon be removed.

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