SU1641847A1 - Compound for tentative protection against corrosion - Google Patents

Abstract

This invention relates to means of temporary protection against corrosion of metal structures made from ferrous metals. The invention improves the protection of metal structures from ferrous metals in a humid tropical climate and gives biostability to the composition due to the use in composition of the composition, wt.%: Olif oxoxol 94.0-96.9 dicyclohexylammonium salt and Cfo-Cis synthetic fatty acids 3.0 -5.0, 0.1-1.0 ma.ch. polyhexamethylene guanidine hydrochloride. 2 tab.

Description

This invention relates to means of temporary protection against corrosion of metal structures made from ferrous metals.

The purpose of the invention is to increase the effectiveness of the protection of metal structures from ferrous metals in a humid tropical climate and to impart biostability to the composition.

The dicyclohexylammonium salt (DCHA) and -C-ig-synthetic fatty acids of the general formula ()% NH-HOOCR with a DCHA content of 43.2%, is an oil-soluble corrosion inhibitor MSDA-11.

Polyhexamethylene guanidine hydrochloride oligomer of the formula

H-W - C - NH - (CH2) g-l -nHCl, - L NH

Clauses 4-6 are manufactured by the industry under the name Metacid.

The preparation of the composition is carried out as follows.

A required amount of an Oxyol linseed is placed in a glass or metal container, which is heated in a water bath to 50-60 ° C, the MCDA-11 inhibitor and polyguanidine are introduced and mixed vigorously to obtain a homogeneous mixture. If necessary, the composition is diluted with white spirit to viscosity 20-25 s by viscometer VZ-4. The application of the composition is carried out at a temperature not lower than 10 ° C, and the surface is dried for 24 hours.

Example 1u Used composition at a lower level of ingredients, wt.%

|

Drying oil Oksol

MSDA-11

Polyguanidine

96.9 3.0

0.1

Example 2. The composition is used at the top level of ingredients, wt.%:

Drying oil Oxol 94.0 MSDA-115.0

Poly uanidin1,0

Example 3, Used composition with an average level of ingredients wt.%:

Drying oil Oksol 95,45 MSDA-114,0

Polyguanidine 0.55

Example 4. The composition is used at a level below the lower level of ingredients, wt.

Drying oil Oksol 98.95 MSDA-111.0

Polyguanidine0.05

Example 5. The composition is used at an ingredient level above the top level of ingredients, wt%; Drying oil Oksol 88.5 MSDA-1110.0

Polyguanidine1,5

The results of the tests of the protective effect of the compositions applied to ZOHGSNA as uncorroded 9

and with corrosion products are presented in table. 1.2.

Formula

and h

gaining

A temporary corrosion protection composition comprising an Oxyol drying oil and an atmospheric corrosion inhibitor, characterized in that, in order to increase the efficiency of protection of ferrous metal structures in a humid tropical climate and make the composition biologically resistant, it contains salt of dicyclohexylammonium and C, 0 C - synthetic fatty acids and additional-. relatively polyhexamethylene guanidine hydrochloride with the following ratio of components, wt.%:

Drying oil Oksol 94,0-96,9

Salt dicyclohexyl-e

ammonium and 5 synthetic fatty

acid 3.0-5.0

Polyhexamethylene guanidine hydrochloride 0.1-1.0

Table 1

0

7004506 months

1200900 15 months

1200900 15 months (no corrosion)

1200900 15 months (no corrosion) 15 months (no corrosion) 250150 4 months

1200900 15 months (no corrosion)

1 for 15-20 days

About 3 months The same

and

-

m

No coating Drying oil Oksol Composition known

according to example 1 2 3

4 5

3 days14 days2 days

1 month3 months14 days

6 months9 months3 months

12 months14 months12 months (no corrosion)

18 months18 months12 months (no corrosion)

18 months (no 18 months (no 12 months (no corrosion) corrosion) corrosion)

10 months

12 months

10 months

18 months (no 18 months (no corrosion) corrosion)

table 2

10 months

12 months

10 months

Claims (1)

5 claims Composition for temporary protection against corrosion, including Oksol linseed oil and atmospheric corrosion inhibitor, Ιθ characterized in that, in order to increase the efficiency of protection of ferrous metal structures in a humid tropical climate and impart biojg resistance to the composition, it contains a dicyclohexylammonium salt as an atmospheric corrosion inhibitor and C-C ^ synthetic fatty acids and ext. relative polyhexamethylene guanidine hydrochloride in the following ratio of components, wt.%: Dryse Oxol 94.0-96.9 Dicyclohexyl 'ammonium salt and C ₁₀ -C ₄₃ synthetic fatty acids 3.0-5.0 Polyhexamethylene guanidine hydrochloride 0.1-1.0 Table! Type of coating applied to an uncorroded surface The time until the first corrosion lesions, h Weight loss after 18 months of testing in conditions of 100% humidity at 40 ° C, g / m ² Biostability, points Exposure to 100% humidity at 40 ° C Salt spray Humid tropical climate Without cover 10 5 12 320 Drying oil 100 70 1 month 180 5 for 3-5 days MSDA-P 125 75 ' 2 month 100 Drying oil with chrome tom guanidine (prototype) 700 450 6 months • 60 1 for 15-20 days Composition according to measure 1 1200 900 15 months thirty 0 for 3 months 2 1200 900 15 months (corro 45 Also Ziya no) 3 1200 900 15 months (corro Ziya no) fifteen _eleven_ 15 months Ziya no) 20 -- 4 250 150 4 month 90 5 1200 900 15 months (no corrosion) fifteen __ —— —m. - - - —and table 2 Type of coating applied to a corroded surface Time to resumption of corrosion on corroded samples Outdoor area Louvre box Humid tropical climate Without cover 3 days 14 days 2 days Drying oil 1 month 3 month 14 days Famous composition 6 months 9 months 3 month as in example 1 12 months 14 months 12 months (no corrosion) 2 18 months 18 months 1.2 months (no corrosion) 3 18 months (no 18 months (no 12 months (no corrosion) corrosion) korooziii) 4 10 months 12 months 10 months 5 18 months (no 18 months (no - corrosion) corrosion)