A rust remover for ship propellers, a rust removal method and a preparation method of the rust remover

Abstract

The present invention discloses a rust remover for a ship propeller, a rust removal method and a preparation method of the rust remover. The rust remover is composed of the following raw materials in parts by weight: 6.5 - 7.5 parts of a sealing agent, 2.5 - 3.5 parts of a wetting solvent; the sealing agent is composed of the following raw materials in parts by weight: 7.5 - 8.5 parts of a mixed grease, 1.5 - 2.5 parts of an additive; the mixed grease is composed of the following raw materials in parts by weight: 7.5 - 8.5 parts of a lubricating grease, 1.5 - 2.5 parts of a base oil; the additive is composed of the following raw materials in parts by weight: 3.5 - 4.5 parts of a dispersant, 5.5 - 6.5 parts of an antioxidant, and the wetting solvent is composed of the following raw materials in parts by weight: 0.5 - 1.5 parts of beef tallow, 0.5 - 1.5 parts of yellow glycerol; the rust removal method includes wiping, applying the rust remover, and wiping off; the preparation method of the rust remover includes weighing the raw materials to obtain the grease and the additive, mixing the two to make the sealing agent, mixing the beef tallow and the yellow glycerol to make the wetting solvent, and adding the wetting solvent to the sealing agent and mixing. Compared with the prior art, the present invention can prevent rusting at the inner cavity of the oil cylinder, the inner cavity of the hub and the connection position between the hub and the blade during the waiting period for the quality inspection of the pressure test after passing water pressure test or before shipment.

Description

Technical Field

[0001] The present invention relates to a rust removal method for ship propellers and belongs to the technical field of ship propeller manufacturing. Background Art

[0002] For marine controllable pitch propeller hubs and cylinder products, during the waiting period for quality inspection of the pressure test after hydrostatic pressure test, due to the long placement time of the products, the inner cavities of the cylinders, the inner cavities of the hubs, and the positions where the hubs are in contact with water at the connection positions between the hubs and the blades will rust severely, and it is necessary to clean the rust stains in the inner cavities of the cylinders, the inner cavities of the hubs, and the connection positions between the hubs and the blades. At present, basically, it is a manual cleaning method. According to the size and complexity of the products, at least two operators are required to clean one product, and the cleaning time is relatively long. In addition, a large amount of corundum abrasive cloth, waterproof sandpaper, and scouring pads are required during cleaning. If the rust stains are stubborn, even after multiple cleanings, it is difficult to meet the detection requirements for the surface finish of the inner cavities of the cylinders, the inner cavities of the hubs, and the connection positions between the hubs and the blades. Especially when the rust stains are particularly severe, using corundum abrasive cloth, waterproof sandpaper, and scouring pads to clean the rust stains is too weak, and the rust stains cannot be cleaned thoroughly, and the surface finish of the products is difficult to meet the requirements. While if the cleaning strength is too large, it will cause the product dimensions to exceed the tolerance, especially at the connection positions between the hubs and the blades, and the product quality cannot be guaranteed, seriously affecting the production cycle. Summary of the Invention

[0003] The purpose of the present invention is to provide a rust remover for ship propellers, a rust removal method, and a preparation method of the rust remover to solve the problem of rust stain cleaning after hydrostatic pressure test of marine propellers.

[0004] A rust remover for ship propellers provided by the present invention is composed of the following raw materials in parts by weight: 6.5 - 7.5 parts of a sealing agent, and 2.5 - 3.5 parts of a wetting solvent;

[0005] The sealing agent is composed of the following raw materials in parts by weight: 7.5 - 8.5 parts of a mixed grease, and 1.5 - 2.5 parts of an additive;

[0006] The mixed grease is composed of the following raw materials in parts by weight: 7.5 - 8.5 parts of a lubricating grease, and 1.5 - 2.5 parts of a base oil;

[0007] The additive is composed of the following raw materials in parts by weight: 3.5 - 4.5 parts of a dispersant, and 5.5 - 6.5 parts of an antioxidant.

[0008] The wetting solvent is composed of the following raw materials in parts by weight: 0.5 - 1.5 parts of beef tallow, and 0.5 - 1.5 parts of yellow glycerin.

[0009] Further, the rust remover for ship propellers is composed of the following raw materials in parts by weight: 7 parts of a sealing agent, and 3 parts of a wetting solvent.

[0010] Further, the grease is general lithium-based grease or calcium-based grease.

[0011] Further, the base oil is any one of jojoba oil, sweet almond oil, and grape seed oil.

[0012] Further, the dispersant is one or a mixture of several of ethylene bis-stearamide, ethylene bis-stearic acid amide, polyethylene wax, polyvinylamide, cellulose derivatives, and monoglyceride stearate.

[0013] Further, the antioxidant is one or a mixture of several of DLTP, TBHQ, dibutylhydroxytoluene (BHT), butylhydroxyanisole (BHA), and 2,6-di-tert-butyl-p-cresol.

[0014] A preparation method of a rust remover for a ship propeller proposed by the present invention includes the following steps:

[0015] (1) Weigh each raw material according to the formula ratio;

[0016] (2) Take the grease and the base oil according to the weight components, put the grease into a dry container, add the base oil, dilute the grease, and uniformly mix the two to obtain a mixed grease;

[0017] (3) Take the dispersant and the antioxidant according to the weight components, and uniformly mix them to obtain an additive;

[0018] (4) Take the mixed grease obtained in step (2) and the additive obtained in step (3) according to the weight components. Place the mixed grease in a dry container, slowly add the additive at normal temperature, and stir while adding to make the additive fully blend in the mixed grease to prepare a sealing agent for standby;

[0019] (5) Take beef tallow and yellow glycerin according to the weight components. Place the beef tallow in a dry container, heat it to a flowing state, and add the yellow glycerin in 2 - 3 times. Each time it is added, stir it clockwise fully to prepare a lubricating solvent for standby.

[0020] (6) Take the sealing agent prepared in step (4) and the lubricating solvent prepared in step (5) according to the weight components. Place the lubricating solvent in a dry container, and under the conditions of normal temperature and light avoidance, add it to the sealing agent evenly in 5 - 6 times, and stir in the same direction for at least 10 minutes to obtain the rust remover.

[0021] A rust removal method for a ship propeller proposed by the present invention includes the following steps:

[0022] (1) After the propeller product passes the water pressure test, wipe the surface and each part inside the product with a dry cotton cloth.

[0023] (2) Reserve the above rust remover. According to the degree of rust on the product, apply the rust remover 1 - 3 times with a dry cotton cloth at the rusty position. The application thickness is 1 - 3 mm, and the application range is 3 - 5 cm around the excessive rust position. The interval between each application is 15 - 30 minutes.

[0024] (3) After step (2) is completed, let it stand for 1 hour, and then wipe the residual rust remover on the product surface with a dry cotton cloth to complete rust removal.

[0025] Further, for better rust removal effect, in step (2), first heat the rust remover at 30 °C for 5 minutes, and then apply it.

[0026] The rust remover for ship propellers proposed by the present invention, the main function of the sealing agent in its raw materials is to clean, seal and prevent rust. It is mixed with a lubricating and dissolving agent, and has a very good rust removal effect. Compared with the prior art, the present invention has the following advantages:

[0027] (1) It can effectively prevent rusting at the inner cavity of the oil cylinder, the inner cavity of the hub and the connection position between the hub and the blade during the waiting period for pressure test quality inspection after water pressure test or before shipment.

[0028] (2) Ensure the smoothness of the inner cavity of the oil cylinder, the inner cavity of the hub and the connection position between the hub and the blade, meet the requirements of pressure test quality inspection, and ensure product quality.

[0029] (3) Ensure that the finished product size will not be damaged during the cleaning process, and will not cause the product size at the inner cavity of the oil cylinder, the inner cavity of the hub and the connection position between the hub and the blade to exceed the tolerance due to excessive cleaning, and ensure that the product size after rust removal meets the requirements of the drawing design.

[0030] (4) Save a large amount of capital consumption for purchasing consumables such as corundum sandpaper, waterproof sandpaper, and scouring pads.

[0031] (5) It can shorten the cleaning cycle, save time, reduce the manual workload, and improve production efficiency. Detailed implementation mode

[0032] Next, the present invention will be described in detail in combination with the embodiments

[0033] Embodiment 1

[0034] A rust remover for ship propellers is composed of the following raw materials in parts by weight: 7 parts of sealing agent, 3 parts of lubricating and dissolving agent. The sealing agent is composed of the following raw materials in parts by weight: 8 parts of mixed grease, 2 parts of additive. The mixed grease is composed of the following raw materials in parts by weight: 8 parts of lubricating grease, 2 parts of base oil. The additive is composed of the following raw materials in parts by weight: 4 parts of dispersant, 6 parts of antioxidant. The lubricating and dissolving agent is composed of the following raw materials in parts by weight: 1 part of beef tallow, 1 part of yellow glycerin.

[0035] The grease is calcium-based grease.

[0036] The base oil is grape seed oil.

[0037] The dispersant is a mixture composed of polyvinylamide, cellulose derivative and monoglyceride stearate in a weight ratio of 1:1:1.

[0038] The antioxidant is a mixture composed of dibutylhydroxytoluene (BHT), butylhydroxyanisole (BHA) and 2,6-di-tert-butyl-p-cresol in a weight ratio of 1:1:1.

[0039] The method for preparing the rust remover for ship propellers proposed in this embodiment includes the following steps:

[0040] (1) Weigh each raw material according to the formula ratio;

[0041] (2) Take the grease and the base oil according to the weight components, put the grease into a dry container, add the base oil, dilute the grease, and obtain a mixed grease after uniform mixing of the two;

[0042] (3) Take the dispersant and the antioxidant according to the weight components, and obtain an additive after uniform mixing;

[0043] (4) Take the mixed grease obtained in step (2) and the additive obtained in step (3) according to the weight components, place the mixed grease in a dry container, slowly add the additive at normal temperature, and stir while adding to make the additive fully blend in the mixed grease to prepare a sealer for standby;

[0044] (5) Take beef tallow and yellow glycerin according to the weight components, place the beef tallow in a dry container, heat it to a flowing state, and add the yellow glycerin in 2 times. Each time it is added, stir it fully in the clockwise direction to prepare a lubricant for standby.

[0045] (6) Take the sealer prepared in step (4) and the lubricant prepared in step (5) according to the weight components, place the lubricant in a dry container, and add it to the sealer evenly in 5 times under the conditions of normal temperature and light avoidance, and stir in the same direction for 10 minutes to obtain the rust remover.

[0046] Example 2

[0047] A rust remover for ship propellers is composed of the following raw materials in parts by weight: 6.5 parts of sealer, 2.5 parts of lubricant. The sealer is composed of the following raw materials in parts by weight: 7.5 parts of mixed grease, 1.5 parts of additive. The mixed grease is composed of the following raw materials in parts by weight: 8 parts of grease, 2 parts of base oil. The additive is composed of the following raw materials in parts by weight: 4 parts of dispersant, 6 parts of antioxidant. The lubricant is composed of the following raw materials in parts by weight: 1 part of beef tallow, 1 part of yellow glycerin.

[0048] The grease is a general-purpose lithium-based grease.

[0049] The base oil is jojoba oil.

[0050] The dispersant is ethylene bis-stearamide.

[0051] The antioxidant is DLTP.

[0052] The preparation method of this example is the same as that of Example 1.

[0053] Example 3

[0054] A rust remover for a ship's propeller is composed of the following raw materials in parts by weight: 7.5 parts of a sealing agent, 3.5 parts of a lubricating solvent. The sealing agent is composed of the following raw materials in parts by weight: 8.5 parts of a mixed grease, 2.5 parts of an additive. The mixed grease is composed of the following raw materials in parts by weight: 8 parts of a grease, 2 parts of a base oil. The additive is composed of the following raw materials in parts by weight: 4 parts of a dispersant, 6 parts of an antioxidant. The lubricating solvent is composed of the following raw materials in parts by weight: 1 part of beef tallow, 1 part of yellow glycerin.

[0055] The grease is a calcium-based grease.

[0056] The base oil is sweet almond oil.

[0057] The dispersant is polyethylene wax.

[0058] The antioxidant is 2,6-di-tert-butyl-p-cresol.

[0059] The preparation method of this example is the same as that of Example 1.

[0060] Example 4

[0061] A rust removal method for a ship's propeller includes the following steps:

[0062] (1) After the propeller product undergoes hydrostatic pressure testing, use a dry cotton cloth to wipe every part of the product surface and inside once.

[0063] (2) Take the rust remover of Example 1 above for standby. Dip a dry cotton cloth into the rust remover and evenly apply it on the rusty surface of the product with a thickness of 1 mm. The application range should be 3 cm more than the rusty position for one week. After application, let it stand for 20 min, and then evenly apply it on the rusty surface of the product after passing water with a thickness of 1.5 mm. The application range should still be 3 cm more than the rusty position for one week.

[0064] (3) After step (2) is completed, let it stand for 1 hour, and then use a dry cotton cloth to wipe off the residual rust remover on the product surface to complete rust removal.

[0065] Example 5

[0066] A rust removal method for a ship propeller, comprising the following steps:

[0067] (1) After the propeller product is hydrostatically tested, wipe every part of the product surface and interior with a dry cotton cloth.

[0068] (2) Take the rust remover of the above Example 1 for standby, then heat the rust remover at 30 °C for 5 minutes, and then dip a dry cotton cloth with a rust remover thickness of 1.5 mm and evenly apply it on the rusty surface of the product with a thickness of 2 mm. The application range should be 5 cm more than the rusty position for one week. Then let it stand for 30 minutes, and then evenly apply it on the rusty surface of the product again with a thickness of 3 mm. The application range should still be 5 cm more than the rusty position for one week. Then let it stand for 15 minutes, and for the third time, evenly apply it on the rusty surface of the product with a thickness of 1.5 mm. The application range should be 5 cm more than the rusty position for one week.

[0069] (3) After step (2) is completed, let it stand for 1 hour, and then wipe the residual rust remover on the product surface with a dry cotton cloth to complete rust removal.

Claims

1. A rust remover for a ship propeller, which is composed of the following raw materials in parts by weight: 6.5 - 7.5 parts of the degreasing agent, 2.5 - 3.5 parts of the lubricating solvent; characterized in that, The degreasing agent is composed of the following raw materials in parts by weight: 7.5 - 8.5 parts of mixed grease, 1.5 - 2.5 parts of additive; The mixed grease is composed of the following raw materials in parts by weight: 7.5 - 8.5 parts of lubricating grease, 1.5 - 2.5 parts of base oil; The additive is composed of the following raw materials in parts by weight: 3.5 - 4.5 parts of dispersant, 5.5 - 6.5 parts of antioxidant; The lubricating solvent is composed of the following raw materials in parts by weight: 0.5 - 1.5 parts of beef tallow, 0.5 - 1.5 parts of yellow glycerin.

2. The rust remover for a ship's propeller according to claim 1, characterized in that, It is composed of the following raw materials in parts by weight: 7 parts of degreasing agent, 3 parts of lubricating solvent.

3. The rust remover for a ship's propeller according to claim 1 or 2, characterized in that, The lubricating grease is general lithium-based lubricating grease or calcium-based lubricating grease.

4. The rust remover for a ship's propeller according to claim 1 or 2, characterized in that The base oil is any one of jojoba oil, sweet almond oil, and grape seed oil.

5. The rust remover for a ship's propeller according to claim 1 or 2, characterized in that, The dispersant is one or a mixture of several of ethylene bis-stearamide, ethylene bis-stearate, polyethylene wax, polyvinylamide, cellulose derivatives, and monoglyceride stearate.

6. The rust remover for a ship's propeller according to claim 1 or 2, characterized in that The antioxidant is one or a mixture of several of DLTP, TBHQ, dibutylhydroxytoluene (BHT), butylhydroxyanisole (BHA), and 2,6-di-tert-butyl-p-cresol.

7. A preparation method of a rust remover for a ship propeller according to claim 1, characterized in that, It includes the following steps: (1) Weigh each raw material according to the formula ratio; (2) Take the lubricating grease and base oil according to the weight components, put the lubricating grease into a dry container, add the base oil, dilute the lubricating grease, and uniformly mix the two to obtain the mixed grease; (3) Take the dispersant and antioxidant according to the weight components, and uniformly mix them to obtain the additive; (4) Take the mixed grease obtained in step (2) and the additive obtained in step (3) according to the weight components, place the mixed grease in a dry container, slowly add the additive at room temperature, and stir while adding to make the additive fully blend in the mixed grease, and prepare the degreasing agent for standby; (5) Take the beef tallow and yellow glycerin according to the weight components, place the beef tallow in a dry container, heat it to a flowing state, add the yellow glycerin in 2 - 3 times, and stir clockwise fully each time to prepare the lubricating solvent for standby; (6) Take the degreasing agent prepared in step (4) and the lubricating solvent prepared in step (5) according to the weight components, place the lubricating solvent in a dry container, and uniformly add it to the degreasing agent in 5 - 6 times under the conditions of normal temperature and light avoidance, and stir in the same direction for at least 10 min to obtain the rust remover.

8. A rust removal method for a ship propeller, characterized in that, It includes the following steps: (1) After the propeller product undergoes hydrostatic pressure test, wipe each part on the surface and inside of the product with a dry cotton cloth; (2) Take the rust remover of claim 1 for standby, first heat the rust remover at 30 °C for 5 min, then apply it, and apply the rust remover 1 - 3 times on the rusty position with a dry cotton cloth according to the rust degree of the product, the application thickness is 1 - 3 mm, the application range is 3 - 5 cm around the redundant rusty position, and the interval between each application is 15 - 30 min; (3) After step (2) is completed, let it stand for 1 hour, and then wipe the residual rust remover on the surface of the product with a dry cotton cloth to complete rust removal.