JPS5920365A - Rust-resisting coating - Google Patents

Abstract

PURPOSE:To provide a non-toxic rust-resisting coating chemically stable without crack formation within films even in application to sharp ends of substrates, by incorporating isopropyl alc., water, sodium nitrite, tri-n-butylamine, and cetylamine. CONSTITUTION:40-100pts. water, 1-5.0pts. sodium nitrite, 0.4-2.5pts. tri-n- butylamine, and 0.3-2.0pts. cetylamine are added to 1,000pts. isopropyl alc., yielding a rust-resisting coating. By virtue of said rust-resisting coating, it is possible to supply in large amounts and with low cost clear rust preventives chemically and physically stable without deterioration with age, perfectly effective in keeping entire surfaces to be applied, including sharp ends of silicon steel sheets, iron core plates of coils made of ferrous materials, and thin sheets or round bars of German silver, etc., which have been considered as incapable of preventing rust by anticorrosive thin films.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an anti-corrosion agent (rust preventive agent), and more specifically, a rust preventive agent for preventing the rust of iron materials such as coil iron core single T's and rust preventive agent for jar seven full barber malloy (alloy). Regarding paint.

There are many types of anti-BM materials used for sleeves, such as festival-based and oil-based ones, but all of them are effective when applied to the above-mentioned purpose of preventing rust on the coil core. The fender effectiveness is not necessarily fully satisfied.
I couldn't wait.

In other words, in steel materials such as veneer plates of EI*v cores and F'FD cores, which have a large cut creepage distance and many corners and many sharp corners, the cut surfaces, especially the sharp corners, are There are cases where the rust agent coating is easily damaged by ionization and oxygen in the air enters through the colored part through moisture, causing oxidative rusting, and cases where ions in the atmosphere cause rusting and this is accelerated. was found to be the main cause of rust.

Therefore, the present inventor focused on the above-mentioned cause of rust and conducted a Japanese and Japanese inspection.
Examination 1 - Results We developed the anti-rust coating of the present invention according to the following example, applied it to a single plate of a coil core, and repeated severe rust tests. It has now become possible to provide a large quantity of extremely inexpensive rust-preventing paint that does not cause cracks or rust, is chemically stable, and is non-toxic to humans and other living organisms.

Next, an example thereof will be explained.

Example! (1) NaN0. (Sodium nitrite) 1-2g
Mix with 60cc of Hlo (water) at room temperature and stir to dissolve. Ru.

(2) Add 1,000 Cf of isoprobyl alcohol to the above Sample 1 in an atmosphere at room temperature and dissolve with stirring.

...Sample 2 (5) To Sample 12, tri-n-butylamine 2Cf and 0.6 g of cetylamine were added in an atmosphere at room temperature, and the 14 mixtures were dissolved to prepare the anticorrosive paint of the present invention.

A rust-preventive coating of 0.01 to 005 μm was applied to the surface of an iron core veneer, a pure iron thin plate, a round bar surface, and a German silver permalloy thin plate using a spray method or a dipping method using the anticorrosive paint according to Example 1, and the anticorrosive coating was heated to 10 days and nights (240 hours) in a high-temperature, high-humidity atmosphere in a constant temperature and humidity chamber at 49°C and 95% relative humidity.
As a result of taking it out and examining the sharp part after leaving it, it was found that it could be observed with the naked eye.
Under close observation, the occurrence of rust, including cracks in the anti-rust coating, was completely visible, and the anti-rust coating did not peel off unless the material was scraped with a carbon steel knife.

A rust-indicating test was conducted using a mixed solution of potassium ferricyanide, phenolphthalein, and water (no indicative reaction was observed, confirming a perfect rust-preventing effect).

The above-mentioned anti-corrosion paint was transparent as a whole, with no emulsions, precipitates, free substances, etc., both after 1 hour of manufacture and after 90 days, and the pH value was 8-9.
After O1 drying, it was 7.2 to 74, and was stable with no chemical or physical changes over time.

According to this invention as above, 1.40 to 100 parts of water is added to 1,000 parts of Improv beer alcohol. ! 11
! 1-5 parts of sodium nitrate, 0 tri-n-butylamine
By mixing 4 to 25 parts of cetylamine and 03 to 20 parts of cetylamine to create a rust-preventive paint, it is possible to prevent coils made from silicon copper plates and other iron-based materials, which were conventionally considered impossible to fix with an ultra-thin rust-preventive coating. A chemically and physically stable and transparent rust preventive agent that has a perfect overall rust preventive effect on iron core veneers, German silver thin plates, round bars, etc., and does not change over time. There are many advantages such as being able to offer and its industrial effectiveness is dog.

Patent creator Sa # Cao, and 1-1p
＋ for the same day Noriyuki'
+-), I: ;+shi-15, ~1

Claims (1)

[Claims] Isoglobin alcohol (iso-probe alcohol) 40-100B per 1,000 autopsies,
, A i1'+ Ik f triu l,
1 to 5.0 ilj, tri-n-
Final amine 04-25 parts, cetylamine 06-2.
Rust-preventive paint containing 0 and 0, respectively.