GB/T 16267-2025Test method of packaging materials — Vapor corrosion inhibiting ability (English PDF)

3.1 test surface

The surface of a material specially processed for testing to check for corrosion.

3.2 blank test

A test in which the test apparatus containing only a test piece without the volatile rust preventive inhibitor.

3.3 volatile rust preventive inhibitor

A volatile rust preventive material of which the main component is a volatile corrosion inhibitor.

NOTE. Primarily available in powder, granular, flake, or liquid form.

6.12 Wide-mouth bottle. Meets the requirements of GB/T 11414, volume 1000 mL,

inner diameter of the bottle mouth (ground joint size) 60 mm.

7.1 Drying oven. Meets the requirements of GB/T 30435, temperature fluctuation ±

2 °C.

7.2 Incubator. Meets the requirements of GB/T 28851, temperature fluctuation ± 1 °C.

7.3 Electronic balance. Sensitivity 0.1 mg.

9.1 Preparation of test pieces

Before the test, sand the surface of the test piece with sandpaper to make the surface flat, free of pits, scratches, or rust. Use tweezers to hold degreased cotton or degreased gauze and wash it three times in anhydrous ethanol. Then dry it with hot air before use.

Do not touch the prepared test piece with bare hands. Test pieces not immediately used in the test shall be stored in a desiccator containing silica gel desiccant and used within 8 h, or re-sanded and cleaned after 8 h. Each test requires 4 test pieces, one of which is for a blank test.

9.2 Treatment of test apparatus before use

Before assembling the test apparatus, wide-mouth bottles, rubber stoppers, thumbtacks, paper clips, glass containers, and petri dishes shall be carefully cleaned and rinsed twice with distilled water, then dried with dry air or hot air. Before assembly, the test apparatus was placed in the laboratory at ambient temperature to ensure its temperature matched the ambient temperature.

9.3 Assembly of test piece

9.3.1 Drill a 15 mm diameter through hole at the center of the end face of one No. 13 rubber stopper and two No. 9 rubber stoppers.

9.3.2 Press the test piece prepared as described in 9.1 into the through hole on the large face of one of the No. 9 rubber stoppers, ensuring the test surface is parallel to the large face of the No. 9 rubber stopper, with 2 mm to 3 mm of the test piece protruding from the large face of the No. 9 rubber stopper, as shown in Figure 1a).

9.3.3 Pass an aluminum tube through the center of the No. 13 rubber stopper, and insert No. 9 rubber stoppers into the protruding ends of the aluminum tube, with the small faces of the two No. 9 rubber stoppers facing the No. 13 rubber stopper. A rubber tube is pre-fitted between the small face of the No. 13 rubber stopper and the No. 9 rubber stopper containing the test piece. The aluminum tube inside the No. 9 rubber stopper containing the test piece shall be in contact with the concave surface of the test piece.

The large face of the No. 13 rubber stopper is in contact with the small face of the No.

9 rubber stopper without the test piece, as shown in Figure 1b). ......