ASTM B117 Salt Spray Corrosion Testing Standard

Standard practice for operating salt spray (fog) apparatus for corrosion testing of metallic materials used in key manufacturing and automotive components, providing comprehensive procedures for environmental testing and material durability assessment.

Standard Overview

Standard Code

ASTM B117-19

Publication Date

2019-05-01

Status

Active ASTM Standard

Application

Corrosion Testing

Salt Spray Test Procedures

Apparatus Setup

Proper configuration of salt spray chamber and solution preparation

Chamber Temperature: 35°C ± 2°C
Solution Concentration: 5% NaCl by mass
pH Range: 6.5 to 7.2

Specimen Preparation

Sample cleaning, positioning, and protection requirements

Cleaning Method: Degreasing + Rinsing
Positioning Angle: 15° to 30° from vertical
Protection Areas: Mask non-test surfaces

Test Execution

Continuous salt spray exposure and monitoring requirements

Spray Rate: 1-3 mL/h per 80 cm²
Test Duration: As specified (24h-1000h+)
Monitoring: Continuous operation

Evaluation Criteria

Visual Assessment

Systematic examination of corrosion products and surface changes

Red Rust: Time to first appearance
White Corrosion: Coverage percentage
Base Metal: Exposure assessment

Coating Performance

Assessment of protective coating integrity and adhesion

Adhesion Loss: Tape test results
Blistering: Size and frequency
Scribe Creepage: Maximum distance

Frequently Asked Questions

What is ASTM B117?

ASTM B117 is a standard practice for operating salt spray (fog) apparatus for corrosion testing of metallic materials, including those used in key manufacturing and automotive components.

How long does ASTM B117 testing take?

ASTM B117 test duration varies by material and application requirements, typically ranging from 24 hours to several weeks depending on the corrosion resistance requirements for the specific application.

Why is ASTM B117 important for key manufacturing?

ASTM B117 testing ensures that key materials and coatings can withstand corrosive environments, maintaining functionality and appearance over the expected service life of automotive and motorcycle keys.

What are the key test conditions for ASTM B117?

Key conditions include 35°C ± 2°C chamber temperature, 5% NaCl solution, pH 6.5-7.2, and continuous salt spray exposure at 1-3 mL/h per 80 cm² collection rate.

Official Standards Authority

ASTM International

Access the official ASTM B117 standard documentation for salt spray corrosion testing procedures and apparatus specifications.

Visit ASTM Official Site

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