Understanding the "Corrosion" Pictogram and Its Hazards

Hazard Communication
English (NZ)

The Problem

Corrosive chemicals pose serious risks to workers, including severe burns, eye injuries, and damage to equipment and structures. Unfortunately, many incidents happen simply because workers fail to recognise the hazards or take proper precautions. Today, we’ll focus on the 'Corrosion' pictogram under the Globally Harmonised System (GHS), how to identify corrosive substances, and how to protect ourselves when handling them.

Identify the Hazards

The "Corrosion" pictogram represents substances that can:

  • Cause serious damage to skin and eyes.
  • Corrode metals, which can lead to leaks or structural failures.

Examples of Corrosive Substances:

  • Acids (e.g., sulphuric acid, hydrochloric acid)
  • Alkalis (e.g., sodium hydroxide)
  • Bleach, battery acid, and some industrial cleaners

Hazards on Site:

  • Direct contact may cause chemical burns.
  • Damaged or corroded containers may leak hazardous substances.

Safety Practices and Preventative Measures

Understand the “Corrosion” Pictogram:

  • The symbol indicates a substance that is corrosive to skin, eyes, or metals.
  • Always read the label for hazard and precautionary statements.

Follow Precautionary Instructions:

  • Wear appropriate personal protective equipment (PPE) – gloves, goggles, face shields, and chemical-resistant clothing.
  • Use respiratory protection if there is a risk of inhaling corrosive vapours or mists.
  • Wash hands and any exposed skin thoroughly after handling.

Refer to the Safety Data Sheet (SDS):

  • SDSs provide detailed information on safe handling, storage, and first aid.
  • Make sure you understand the emergency procedures and disposal requirements.

Handle and Store Substances Correctly:

  • Store away from incompatible substances and metal containers.
  • Ensure the area is cool, dry, and well-ventilated.

Be Prepared for Emergencies:

  • Know the locations of eyewash stations and emergency showers.
  • Respond to spills or exposures as outlined in the SDS.

Real-Life Case or Scenario

Where possible, use an actual incident that you have experienced or been involved in.

A worker was using an industrial cleaning agent but didn’t wear gloves. They sustained serious chemical burns to their hands. The container had the 'Corrosion' pictogram, but the worker hadn’t noticed it or read the precautionary instructions. This incident could have been prevented by recognising the symbol and using proper PPE.

Employee Responsibilities

  • Check all chemical labels for the "Corrosion" pictogram and read the instructions carefully.

  • Wear PPE as required and follow handling procedures.
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  • Report any damaged containers or unsafe storage practices immediately.

Employer Responsibilities

  • Ensure all staff are trained in the GHS labelling system and chemical safety.

  • Provide correct PPE and maintain emergency wash stations.

  • Ensure corrosive substances are clearly labelled and stored safely.
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  • Provide up-to-date SDSs and make them accessible on site.

Discussion & Questions

  • “What corrosive substances do we use on site, and what precautions are in place?”
  • “Has anyone experienced a near-miss or incident involving corrosive substances?”

Encourage open discussion around safe handling and improvements.

Commitment/Action Plan

Starting today, let’s commit to identifying the 'Corrosion' pictogram, reading labels and SDSs, and using the correct PPE when handling corrosive substances. Safety starts with knowledge and the right precautions.

Wrap-Up

Understanding the 'Corrosion' pictogram is essential to recognising the serious risks posed by corrosive substances. By following WorkSafe NZ guidance and your site’s safety procedures, we can avoid injury and damage. Thanks for doing your part to keep the worksite safe.

Standards Overview

Under the Health and Safety at Work (Hazardous Substances) Regulations 2017, PCBUs must:

  • Ensure hazardous substances are correctly labelled with GHS pictograms.
  • Provide access to Safety Data Sheets.
  • Train workers on the risks and safe handling of hazardous substances.
  • Supply and maintain suitable PPE and emergency equipment.

Disclaimer

These toolbox talks are provided for informational and educational purposes only and are not a substitute for professional legal, health and safety, or regulatory advice.

The content reflects recognised best practices and general industry standards as at the date of publication. However, it may not be applicable to all workplace environments or specific operational contexts.

It is the responsibility of the Person Conducting a Business or Undertaking (PCBU), as well as officers, workers, and other duty holders under the Health and Safety at Work Act 2015 (HSWA), to ensure compliance with all relevant laws, regulations, and WorkSafe New Zealand guidance.

The authors, presenters, and distributors of this toolbox talk disclaim all liability for any loss, damage, or injury arising from the use or reliance on the information provided. Users should seek advice from a suitably qualified health and safety professional or legal advisor for guidance tailored to their specific circumstances.

Always follow your organisation’s policies, procedures, and safe work practices to manage risks and maintain a safe and healthy workplace.

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Last Updated:
April 28, 2025