Product Introduction

Caustic soda adding type liquid degreasing agent
Plus Clean
Nippon Hyomen Kagaku Kabushiki Kaisha R & D center

Introduction

Product Summary

Various stains such as oil, rust, and oxide film adhere toJASCO Plus Clean is a liquid type of degreaser for steel.

the material (Table 1), and many adhere from theExcellent workability due to the liquid type and can be

manufacturing and processing processes. When surface

used for multiple purposes by combination.

treatment is performed, these stains need to be removed,and cleaning according to the characteristics of thematerial and the type of stain is required. The degreasing
step is one of cleaning techniques for creating a cleansurface and is a step of removing an oil such as a press oilor a processing oil, a rust preventive oil, or the like, which

Features・ Liquid degreasing agent of caustic soda adding type・ Concentrated type with low usage

・ Oil floatation type degreasing agent

・ Can be used for multiple purposes by combination(Table 3)

is mainly applied to a metal material (Table 2). We have avariety of degreasing agents depending on the purpose andapplication, and this time, the newly developed liquid

Table 3: Examples of uses and agent combinations

degreasing agent Plus Clean is introduced.

Use1

1

Table 1: Examples of dirt types
Types of dirt
1

2

Processing process

oil (mineral oil, animal andpressing,cutting,rolling,

Agent combination

degreasing

agentforsteel

agent B2

no chelate degreasing agent

caustic

3

electrolytic

prevention

rust (metal oxide)

heat treatment, welding, naturaloxidation

soda+sodium

orthosilicate + agent A

rustvegetable oil)caustic soda + agent A +(electrolyzable)

cleaning

liquidcaustic soda + agent B(desmutting)4

degreasing accelerator

existing degreasing agent +5degreasing agent for brass andsodium orthosilicate + agent

copper

A + agent B

agent A3

resin (organic film)

painting, coating, etc.

4metal (iron, etc.)

cutting, grinding, polishing, etc.

5organic chemicals

process using chemicals

6

soil, sand, etc.

(dust)

7

salts (sodium chloride)(sweat, mist, seawater)

8

water

rain, condensation

Treatment process
The degreasing process is a step of removing an oilsuch as a press oil or a processing oil, a rust preventive
oil, or the like, which is mainly applied to a metallic

Table 2: Purpose of pretreatment
Purposematerial (Table 2, Figure 1). JASCO Plus Clean does

Process
Degreasing

Acid

Electrolytic

pickling

cleaning

Activation

not require any special processes or equipment and canbe used in facilities like conventional degreasing agents.

Degreasing

excellentaverage

good

poor

Rust removal

average

excellent

good

good

Descalingpoor

excellent

goodpoor

Desmutting

averagegood

excellentpoor

Activation

poor

good

good

good

202010301 JASCO Nippon Hyomen Kagaku Kabushiki Kaisha 1

[Product Introduction] Plus Clean
chips oil

effective for improving manageability and reducing cost.

carbonsmut

oxidation scale

oxidation scalematerial (iron)material (iron)oil removal

thin oxide film

material (iron)oxidation scalematerial (iron)smut removal

material (iron)oxide film removal

References
1: Fujio Mamiya; kinnzokuseizyougizyutu, 9-11

removal(1975)

degreasing process

Figure 1: Example of pretreatment process

2: Takumi Kozaki; J. Surf. Finish. Soc. Jpn. Vol. 69 No.
9 (2018)

Mechanisms
A common alkali degreasing agent is composed of analkali builder, a chelating agent, a surfactant, and the like
(Table 4).
The degreasing mechanism of Plus Clean is similar to themechanism of general alkali degreasing, causes surfactants
to adsorb and penetrate the interface between oil and metal
surface, and pulls the oil from the metal surface by rollingup effect (Figure 2). It is a mechanism to prevent
reattachment by the use emulsification of surfactants. 2
Table 4: Components and effects of degreasing agents
Structural component

EffectAlkaline builder

Saponification of fatty acid esters(Caustic alkali, carbonate, silicate,etc.)
Chelating agent

Softening action of hard water,
dispersion stabilization

Surfactant

Surfactant

actionsuchasdispersion action
Other

Defoaming, etc.

1 wetting andpenetration

2 saponification andpeeling

3 emulsification andreattachment preventionoilmaterial (iron)material (iron)surfactant
oilmaterial (iron)Figure 2: Degreasing mechanism

In closing
JASCO Plus Clean is a new liquid type degreaser that ismainly used domestically and abroad as a degreaser forsteel.
Due to the oil separation type, the emulsified oil is brought
into the next process less and has a long life. In addition,
since it is possible to provide characteristics corresponding
to line conditions by combination of agents, it is possible
to reduce the number of chemical points in stock, which is202010301 JASCO Nippon Hyomen Kagaku Kabushiki Kaisha 2