28461 Plan, Perform, and Direct Dross Removal for Hot Dip Galvanizing

Explanatory notes

1The current version of the following documents must be complied with:

AS/NZS 4680:2006 Hot-dip galvanized (zinc) coatings on fabricated ferrous articles,

After-Fabrication Hot Dip Galvanizing: A practical reference for designers, specifiers, engineers, consultants, manufacturers, and users, Galvanizing Association of New Zealand, available at

manufacturer’s instructions.

2Health and safety procedures must be followed in accordance with workplace and legislative requirements for all tasks leading to assessment againstthis standard. Personal protective equipment (PPE) must be used throughout operations in accordance with company procedures and manufacturer’s instructions.

3Definition

Company procedures refer to all documented policies and procedures of the candidate’s employer at the time of training including, but not limited to, those relating to health, safety, environment, quality, and operations.

Outcomes and evidence requirements

Outcome 1

Plan removal of dross from a galvanizing kettle for hot dip galvanizing

Evidence requirements

1.1Dross removal requirements are determined in accordance with company procedures.

1.2Staffing requirements and timing for dross removal activities are planned and communicated in accordance with company procedures.

Outcome 2

Perform and direct the removal of dross from a galvanizing kettle for hot dip galvanizing.

Evidence requirements

2.1Dross is removed from kettle in accordance with company procedures and with minimal zinc drag out.

Rangeall dross is removed, dross is cut and/or vibrated.

2.2Dross is transferred to mould without spillage in accordance with company procedures.

2.3Components in dross are separated and disposed of in accordance with company procedures.

Outcome 3

Monitor quality of the dross removalprocess for hot dip galvanizing.

Evidence requirements

3.1Consistency of the dross removal processesis monitored in accordance with company procedures.

3.2Where applicable, records of dross removal are kept in accordance with company procedures.

Status information and last date for assessment for superseded versions

This CMR can be accessed at

Please note

Providers must be granted consent to assess against standards (accredited) by NZQA, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment.

Industry Training Organisations must be granted consent to assess against standards by NZQA before they can register credits from assessment against unit standards.

Providers and Industry Training Organisations, which have been granted consent and which are assessing against unit standards must engage with the moderation system that applies to those standards.

Requirements for consent to assess and an outline of the moderation system that applies to this standard are outlined in the Consent and Moderation Requirements (CMR). The CMR also includes useful information about special requirements for organisations wishing to develop education and training programmes, such as minimum qualifications for tutors and assessors, and special resource requirements.

Comments on this unit standard

Please contact the NZ Motor Industry Training Organisation (Incorporated) (MITO) you wish to suggest changes to the content of this unit standard.