How to Extend the Life of Your CSSD Equipment with Proper Maintenance

Proper maintenance is the key to keeping your Central Sterile Services Department (CSSD) running efficiently and looking clean.

But there’s a sneaky cosmetic issue that’s becoming more common in medical settings – and it’s not rust.

It’s tea staining – a brown discolouration that affects stainless steel surfaces. If ignored, it can impact cleanliness perception, equipment longevity, and even infection control.

What Is Tea Staining? 

Tea staining is a discolouration of the surface of stainless steel, usually a brown tint, that often follows the ‘grain’ of the metal.

✅ It does not affect the structural integrity of the stainless steel
❌ But it can lead to corrosion if left untreated

It’s most common in environments where stainless is exposed to salt, humidity, or harsh cleaning chemicals – which is why it’s often seen in CSSDs, especially near coastal or urban areas.

According to the Australian Stainless Steel Development Association (ASSDA), tea staining is caused by a breakdown of the passive (protective) layer on stainless steel due to environmental exposure and poor maintenance practices.

Why Does It Happen in CSSDs?

Based on ASSDA and medical environment insights, tea staining typically shows up due to:

1. Environmental exposure – CSSDs near the coast or with high humidity are more vulnerable

2. Poor surface finish – Rough or brushed finishes are more prone than smoother, polished surfaces

3. Wrong grade of stainless – Lower-grade steels (like 304) are more susceptible than marine-grade 316

4. Lack of cleaning – Dirt and moisture left sitting allows tea staining to form

5. Inappropriate cleaning products – Chloride-based cleaners can strip the protective chromium oxide layer

How to Prevent Tea Staining in Your CSSD

✔ Use the right grade of stainless steel – Where possible, opt for 316L in high-risk environments
✔ Polished finish matters – A smoother finish offers better resistance
✔ Daily cleaning – Wipe down with neutral pH cleaners and dry thoroughly
✔ Avoid chloride cleaners – Bleach and chlorine-based products damage the passive layer
✔ Apply preventative maintenance – Use a proper stainless steel care schedule
✔ Use a tea stain remover monthly – Like Emery Industries’ Tea Stain Remover for medical-grade steel

Your Tea Stain Maintenance Schedule

🧼 Daily:
Wipe benches, trolleys, sinks, and work surfaces with a neutral cleaner and dry them thoroughly.

🔎 Weekly:
Inspect equipment for early signs of tea staining – particularly in high-use areas and humid zones.

🧰 Monthly:
Use Emery’s Tea Stain Remover to clean brown discolouration. It’s safe for stainless steel and won’t corrode or stain like acidic cleaners.

How to Use Emery’s Tea Stain Remover

1. Spray the surface and let it sit for 15 mins

2. Use a non-metal scourer (with the grain) to gently remove the stain

3. Wipe clean and dry with a soft cloth or hospital-grade wipe

Why It Matters

Tea staining might be cosmetic – but in sterile areas, appearances matter. Staff, patients, and auditors expect stainless steel equipment to look clean, even if it’s structurally sound.

Final Thoughts – Don’t Let Tea Stains Take Over

Preventing tea staining is simple – with consistent cleaning, proper materials, and the right maintenance products, your CSSD will stay spotless and professional.

Ready to remove and prevent tea staining in your facility?
👉 Get a quote for Emery’s Tea Stain Remover here or email us at sales@emeryindustries.com.au

References

1. Australian Stainless Steel Development Association (ASSDA) – FAQ 6: What is tea staining and how can it be avoided?
   https://www.assda.asn.au/images/PDFs/FAQs/FAQ6.pdf