A protection method for corroded autoclave body
A technology of autoclave and sealing primer, which is applied in the direction of anti-corrosion coatings, coatings, epoxy resin coatings, etc., can solve problems such as shortened service life, and achieve the effects of avoiding potential safety hazards, saving repair time, and prolonging equipment life
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Embodiment 1
[0041] A protection method for a corroded autoclave body is divided into the following three processing steps:
[0042] 1) Inner wall treatment: the inner wall of the corroded autoclave body is cleaned twice by alkali with a concentration of 32%, mechanically polished and derusted to St3 grade, and wiped 5 times;
[0043] 2) Brushing the primer: at a temperature of 24°C, paint 3 layers of sealing primer with a concentration of 25% on the inner wall of the autoclave body treated in step 1);
[0044] 3) Welding of stainless steel plates: After the sealing primer is cured for 1.5 days, the arc-shaped stainless steel plates that have been treated with anticorrosion are tailored and welded in the autoclave body.
[0045] The alkali in the step 1) is ammonia water.
[0046] Wiping in the step 1) is to wipe the inner wall of the corroded autoclave body with a cleaning agent with a concentration of 17%.
[0047] The cleaning agent is a mixture of trichlorethylene and toluene.
[00...
Embodiment 2
[0063] A protection method for a corroded autoclave body is divided into the following three processing steps:
[0064] 1) Inner wall treatment: the inner wall of the corroded autoclave body is cleaned once by alkali with a concentration of 43%, sand blasted and derusted to Sa3 level, and wiped four times;
[0065] 2) Brushing the primer: at a temperature of 38°C, paint a layer of sealing primer with a concentration of 25% on the inner wall of the autoclave body treated in step 1);
[0066] 3) Welding stainless steel plate: After the sealing primer is cured for 5 days, the arc-shaped stainless steel plate that has been treated with anticorrosion is tailored and welded in the autoclave body.
[0067] The alkali in the step 1) is a mixture of sodium hydroxide and ammonium bicarbonate.
[0068] The alkali mixture is mixed according to the weight ratio of sodium hydroxide and ammonium bicarbonate being 1:2.
[0069] Wiping in the step 1) is to wipe the inner wall of the corroded...
Embodiment 3
[0085] A protection method for a corroded autoclave body is divided into the following three processing steps:
[0086] 1) Inner wall treatment: the inner wall of the corroded autoclave body is cleaned twice with a concentration of 25% alkali, mechanically polished and derusted to St3 level, and wiped four times;
[0087] 2) Brushing the primer: at a temperature of 30° C., paint 3 layers of sealing primer with a concentration of 35% on the inner wall of the autoclave body treated in step 1);
[0088] 3) Welding of stainless steel plates: After the sealing primer is cured for 2 days, the arc-shaped stainless steel plates treated with anticorrosion are tailored and welded in the autoclave body.
[0089] The alkali in the step 1) is a mixture of sodium bicarbonate, ammonia water and ammonium bicarbonate.
[0090] The alkali mixture is mixed according to the ratio of sodium bicarbonate, ammonia water, and ammonium bicarbonate in parts by weight of 1:1:4.
[0091] Wiping in the s...
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Abstract
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