SU515779A1 - Grease protective grease - Google Patents

Description

The invention relates to greases used to protect against corrosion of ferrous metals used in seawater in a tropical, arctic climate, for example, for corrosion protection of metal hoses operating in seawater for 5 years.

Known protective plastic grease, operated in combination with sea water. Such lubricants include AM.C-3 (GOST 2712-52), PVC (GOST 10586-63) and SPI-10 (VTUMZ-50-66).

The compositions of these lubricants are presented below. (GOST 2712-52), mass. %:

Aluminum oleostearate 18-22

Oil "Vapor Else

ZES (MRTU-38-1-206-66), mass. %:

Aluminum soap SLC

(Cio-Ci &) 3-5

Petrolatun5-7

Oil "Vapor Else

PVK (GOST 10586-33), mass. %:

Petrolatum60 -70

Ceresin3 - 5

MNI-7 (oxidized ceresin) 0.9-1.1

Cylinder oil 11 Else SPI-10 (VTU MZ-50-66), mass. %:

Ceresin grades 67 or 75 14-16

High-pressure polyethylene 1, 9-2.1.1 Zinc soap of synthetic fatty acids (Ci - C2o) 9-11 Inhibitor-bottoms of synthetic fatty acids 2.9-- 3.1 Oil FPA Else However, these lubricants have insufficiently high protective properties In severe conditions of conservation (sea water).

Also known is the ZES protective plastic grease (MRTU 38-1-206-66), which is a mineral oil thickened with aluminum soap of fatty acid and petrolatum. However, AMS-3, ZES, SPI-10 soap-hydrocarbon lubricants cannot be applied to melted products, as they melt irreversibly change their properties: external appearance, melting point, strength and colloidal stability.

In most cases, the protective grease must be applied to the product by melt-dipping.

Hydrocarbon lubricant PVC, although applied to products from the melt, but has a low melting and creep temperature (50 ° C). In order to improve the protective properties, the proposed lubricant based on mineral oil, aluminum fatty acid soap and hydrocarbon is complete. It contains low molecular weight polyisobutylene, nitroalkylsucimimide urea, COBOL, oxidized ceresin and ceresin as a hydrocarbon. The composition of the proposed lubricant, in weight. %: Aluminous fatty acid Ceresin Yismolecular polyisobactile25 -35 tol-BOO) Nitroalkylsuccinimide 4 -b urea (INGA-1) 0.9 - 1.1 Oxidized ceresin 0.15- 0.25 And it is l Up to 100 Mineral oil As aluminum fatty acid soap, it is recommended to use aluminum stearate; The mixed soap-hydrocarbon thickener used - aluminum stearate and ceresin in a 1: 2 ratio allows to obtain a lubricant that does not change its properties during repeated melting. As a corrosion inhibitor, urea, which has not been previously used in greases Nitroalkylsuccinimide urea (INGA-1), is introduced, which, in combination with oxidized ceresin, gives a synergistic effect of enhancing its activity. To prevent oxidation of the lubricant, when it is repeatedly melted, an antioxidant, an ionol, is introduced into it. Example 1. The proposed 90-20K lubricant is prepared as follows.

Indicators

Black ointment with green shimmer

After warming up, the dropping point, ultimate strength

Chatter; iny in the lubricant layer

T a b l 11 c a 1

In example 1

Uniform, smooth ointment from light dark-brown color 130 95 5.2

100 90

2.1

2.2 0.8

Properties after warming up do not change.

Withstands In a heated mixer, mineral oil MS-20c is loaded in the amount of 51.95% and 6% aluminum stearate, which is dispersed in oil with continuous stirring at 180 ° C for 1 hour. Then the temperature is reduced to 150 ° C and the remaining components are successively loaded into the messenger: ceresin (12%), oxidized ceresin (0.9%), octol-600 (25%) and an IPGA-1 additive (4%). At this temperature and with continuous stirring, the components are kept in a mixer euj, e for 1 hour, while the temperature is lowered to 130 ° C, ionol (0.15%) is introduced and at this temperature the lubricant is held for another 30 minutes. Then turn off the mixing device, heating and the finished lubricant is poured into the cans of 0.8 l. Cooling lubrication occurs at room temperature. PRI mme R 2. Lubricant was prepared in accordance with Example 1, but instead of MS-20c oil, Vapor in the amount of 33.65%, aluminum stearate (8%), ceresin (16%), oxidized ceresin (1 , 1%), octol-600 (35%), INGA-1 (6%), iopol (0.25%). The physico-chemical characteristics of the proposed and known ZES lubricants are presented in Table. 1. As can be seen from the table. 1, lubricant 96-20K is characterized by a high melting point and does not slip from the protected vertical surfaces at 90 ° C. In addition, the lubricant is characterized by good pizkotemturnuernymi and adhesive properties, and elasticity, which allows its use on flexible products (metal hose, cables, etc.). When bending metal hoses, the lubricant does not crack and does not peel off from the protected product in the temperature range from - - 50С to 80 ° С.

table 2

The proposed lubricant does not change its properties after repeated melting, which makes it possible to apply it to the products by the method of dipping from a melt.

The results of comparative tests of the protective properties of lubricants ZES, PVC and 96-20K are presented in Table. 2

As can be seen from the table. 2, the proposed lubricant has its own characteristic, naturally superior to the known lubricants.

Claims (1)

Invention Formula Protective plastic grease based on mineral oil, aluminum fatty acid soap and hydrocarbon, characterized in that, in order to develop protective properties, the lubricant additionally contains low molecular weight polyisobutylene, nitroalkylsuccinimide urea, ionol, oxidized ceresin and, as a hydrocarbon, ceresin at the next 1, that is, the ratio of components, in weight. %: Aluminum Pole fatty kpslot6 - 8 Ceresin12 -16 Low molecular weight and isobutylene25 -35 Urea nitroalkylsuctionsimide4 - 6 Ionol 0.15 - 0.25 Oxidized Derelin0.9 - 1.1 Mineral oil up to 100