JISH 8300
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JIS H 8300 - 1971 Zinc Spray Coating on Iron or Steel

Japanese Industrial Standard, Tokyo Metallikon Co., Ltd.

1. Scope
This standard specifies zinc spray coating on iron or steel products with the object of prevention of corrosion, hereinafter referred to as the "sprayed coating."

2. Kind of Sprayed Coating
The kind of sprayed coating, grade and notation shall be as indicated in Table 1.

Table 1.  Kind of Sprayed Coating

Classification Grade Notation Remarks
Class 1 1
2
3
4
5
6		 ZS Used in the state as sprayed
Class 2 1
2
3
4		 ZSP Used as under coating of painting


3. Quality

3.1 Appearance The surface of sprayed coating shall be free from blobs, cracks and other harmful defects in use.

3.2 Thickness of Coating The thickness of coating shall be as specified in Table 2.

Table 2.  Thickness of Coating (Unit:  mm)

Notation Coating Thickness
Average Minimum
ZS 1
ZS 2
ZS 3
ZS 4
ZS 5
ZS 6		 0.10 min.
0.15 min.
0.20 min.
0.25 min.
0.30 min.
0.35 min.		 0.075
0.12
0.15
0.20
0.25
0.30
ZSP 1
ZSP 2
ZSP 3
ZSP 4		 (---)
(---)
(---)
(---)		 0.05
0.075
0.12
0.15

Adhesivity

3.3.1 The coating shall be well adhering to the base metal and be capable of withstanding severe usage.

3.3.2 When tested under parallel scribed line test of 7-Adhesive Test specified in JIS H 8661 - Testing Method for Zinc Spray Products, the coating between scribed lines shall not peal off from the base metal.
3.4 Corrosion Resisting Property After emerged in 3% sodium chloride (above class 1 in JIS K 8150) solution at 40 +/- 1 degree C for continuous 24 hours, of 6 in JIS H 8661, there shall be no production of harmful blobs, rust or pealing of coating.

4. Tests

4.1 Thickness of Coating The test shall conform to 4 in JIS H 8661.

4.2 Adhesion Test The test shall conform to 7 in JIS H 8661.

4.3 Corrosion Resisting Test The test shall conform to 6 in JIS H 8661.

5. Inspection
The inspection shall be made on appearance, thickness of coating, adhesivity and corrosion resistance, and the result of all of which must satisfy the requirements specified in 3, except when agreed by parties concerned, a portion of the test may be eliminated.

Regarding the method of sampling, it shall be the subject of agreement between parties concerned.

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