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Paint Markers for metal… what does “low corrosion” and “low chloride” mean

All about 'low corrosion' and why the Markal Paint-Riter+ from Weldclass is your safe paint marker for all metals!

Why is 'Low Corrosion' important ?

• As technology continues to advance, many industries such as food production & handling, power generation, oil refining, gas plants, mining, aerospace, shipbuilding, etc are relying upon stainless steel and various alloy metals for use in critical and sensitive equipment.

• Unwanted corrosion can weaken or contaminate this critical equipment and cause dangerous health and safety risks.

• Chemicals such as chlorides, other halogens, sulphur and low melting point metals which are often found in marking and paint products can contribute to unwanted corrosion, degradation, pitting, or general weakening of sensitive materials. To avoid this, it is important to use markers that are ‘low corrosion’.

What is the definition of a 'low corrosion' Paint Marker ?

Whilst there is no national or international standards that define low-corrosion in respect to paint markers, the common accepted threshold for “Low corrosion” markers is those that have less than 250ppm (parts per million) of corrosion-causing substances.

Or to be specific;

• Less than 250ppm of Chlorides and total Halogens

• Less than 250ppm of each low melting point metals (includes: Antimony, Bismuth, Cadmium, Lead, Mercury, Phosphorus, Tin, Zinc, Copper, Silver)

• Less than 250ppm of sulphur

'Low Corrosion' vs 'Low Chloride' – what’s the difference ?

To be truly “low corrosion”, markers should not only be low in chloride, but must also have low content of other corrosive substances (sulphur, fluorides, halogens, low-melting point metals, etc).

Some markers may claim “low chloride”, but have unacceptably high content of these other corrosion-causing substances – therefore they are not truly “low corrosion”.

So how do I know that Paint-Riter+ markers are low corrosion ?

All Markal Paint-Riter+ (formerly Pro-Line HP) markers are formulated to be as low-corrosion as possible.

Specific Paint-Riter+ colours are Laboratory Tested to contain less than n 250ppm (parts per million) of chlorides and other corrosion-causing substances. These colours are: White, Yellow, Red, Black & Pink*

This is why Paint-Riter+ markers are specified and preferred by many workshops and sites across Australia. Using Paint-Riter+ gives you peace of mind that the marker you use today won’t contribute to corrosion related problems on your metal structure tomorrow.

Can I also use Paint-Riter+ as a general paint marker ?

The Paint-Riter+ is used across Australia and the world as a general purpose industrial paint marker for almost any application you can think of… including; all metals, wood, plastic, masonry, glass, ceramic, rubber & more.  And Paint-Riter+ works great on challenging surfaces such as damp, oily or rusty metal.

Paint-Riter+ is truly one of the safest and most versatile industrial paint markers in the world!

More Information | Spec Sheets

This blog is intended to help with: Preventing metal corrosion, rust, oxidisation, oxidation, pitting, etc caused by paint marker pens | What is the best paint marker to use on stainless steel?  |  What is the best paint marker for metal?

All specifications are subject to change without notice. While all care has been taken, Weldclass accepts no responsibility for any inaccuracies, errors or omissions in this information or links and attachments. Any comments regarding intended application are for description and identification purposes only. It is the sole responsibility of the user and/or owner and/or purchaser to select the appropriate product for their intended purpose and to ensure that the product selected is capable of performing correctly and safely in the intended application. E.&O.E. *Pink markers offered by Weldclass are the Markal ‘Valve-Action’ series which are grouped together with the Paint-Riter+ series for convenience and identification purposes.