GB/T 4909.11-2009Test methods for bare wires - Part 11: Test for adherence of coating (English PDF)

1 Scope

GB/T 4909 provisions of this part of the test equipment of bare wire coating adhesion test, sample preparation, measurement procedures, test results and

Assessment and so on.

This section applies to test wire and cable copper conductor surface of the metal layer (such as tin and nickel layers) adhesion.

This section should be used in conjunction with the GB/T 4909.1-2009.

2 Normative references

The following documents contain provisions which, through reference to GB/T 4909 to the present, constitute provisions of this section. For dated reference documents

Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section

Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section.

GB/T 4909.1-2009 Test methods for bare wires - Part 1. General

3 Test Equipment

--- Glass cylinder 250mL;

--- Test bars made of steel or brass rod, surface finish;

--- Loupe magnification of 3 and 7 times two kinds;

--- Winding apparatus around the hand;

--- Sodium sulfide chemically pure;

--- Sulfur chemically pure;

--- Ethanol or diethyl ether.

4 Sample Preparation

5 test procedure

Preparation of sodium sulfide solution over 5.1

Sodium sulfide crystals were dissolved in distilled water, until the solution reaches saturation at 20 °C, then add a sufficient amount of sulfur (250g/L to

On), heated and stirred to make it completely saturated. After filtration, the solution was allowed to stand 24h, made more concentrated solution of sodium sulfide.

Diluted with distilled water and an appropriate amount of sodium polysulfide solution was concentrated, and the resulting sodium polysulfide test solution should be in the proportion of 16 °C is 1.142.

Each sodium polysulfide solution test should have sufficient concentrations, should enable a bare copper wire within 5s completely black, otherwise the test solution […]