Descaling agent for scales on titanium materials
A technology for removing agent and scale, applied in detergent composition, descaling and water softening, toilet black water treatment, etc., can solve problems such as difficult control and unavoidable dissolution of titanium ions.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0025] Test spheres (diameter: 5 mm) of various calcium compounds were formed using a tablet forming machine, and the spheres were immersed in various test solutions for each type of calcium compound to investigate the dissolution status of the calcium compound.
[0026] The calcium compounds used in the dissolution tests were calcium phosphate, calcium carbonate, calcium oxalate or calcium sulfate.
[0027] The test results are shown in Table 1.
[0028] In Table 1, test solution No. 1 is an invention example, in 500 ml of distilled water, 10 g of L-malic acid and 10 g of citric acid as hydroxycarboxylic acid, 5 g of sulfamic acid as sulfamic acid, and 1 g of ammonium sulfate were dissolved. .
[0029] The test solution No. 2 is a comparative example not containing ammonium sulfate. In 500 ml of distilled water, 10 g of L-malic acid, 10 g of citric acid, and 5 g of sulfamic acid were dissolved in 500 ml of distilled water.
[0030] Trial solution No. 3 is an example of a we...
Embodiment 2
[0036] The drain pipe connected to the galley of the aircraft was removed, and the effect of removing scale adhering to the inner wall of the pipe was examined. The removed drainpipe is made of pure titanium with a diameter of 2 inches (approximately 50mm) and a length of 92.6 inches (approximately 2350mm), part of which is gently curved. The adhesion thickness of the scale is about 2 to 5 mm at the end of the pipe.
[0037] figure 1 A scale removal test is schematically shown. refer to figure 1 , (1) is a water tank in which the aqueous solution (2) of the scale remover of the present invention is put. The aqueous solution (2) contained 800 g of L-malic acid and 800 g of citric acid as hydroxycarboxylic acids, 400 g of sulfamic acid as sulfamic acid, and 80 g of ammonium sulfate in 20 liters of water.
[0038](3) is a drain pipe, and scale (9) is attached to the inner wall of the drain pipe (3). At each end of the drain pipe (3), translucent pipes (4), (5) made of polyvi...
Embodiment 3
[0041] The test pieces made of pure titanium were immersed in various test liquids (500 ml liquid volume, 25° C. liquid temperature) in the same manner as in Example 1, and the dissolution state of titanium ions was investigated. Furthermore, the amount of dissolved titanium ions was measured by an atomic absorption photometer.
[0042] A cylinder having an inner diameter of 50 mm, an outer diameter of 53 mm, and a length of 50 mm was used as a test piece.
[0043] Table 2 shows the relationship between the immersion time of the test piece and the dissolved amount of titanium ions.
[0044]
Trial solution
Dissolved amount of titanium ion (μg / ml)
After 24H immersion
After 48H immersion
After 120H immersion
number 1
0.02
0.04
0.08
number 2
0.06
0.09
0.12
number 3
0.04
0.06
0.11
No 4
0.20
0.25
0.30
[0045] With ...
PUM
| Property | Measurement | Unit |
|---|---|---|
| diameter | aaaaa | aaaaa |
| length | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More