Delo® XLI Premix 50/50 (Water Based)

Customer Benefits

Corrosion Protection
Provides superior corrosion and cavitation protection for engine metals, including aluminum, iron, copper and solder alloys. The OAT technology provides ASTM D3306 and ASTM D6210 performance when used in glycol based antifreeze coolants.
Wide Service Application
Recommended as a coolant for all types of cooling systems where freeze protection is not required.
Long service life
The corrosion inhibitors in Delo XLI Corrosion Inhibitor contain a synergistic combination of mono and dicarboxylates that provide superior protection for a minimum of 960,000 kilometers, 12,000 hours, 6 years in on-road and off-road engine applications and 32,000 hours or 6 years in stationary engines. This product does not require regular inhibitor additions if proper maintenance practices are used.
Compatibility
Delo XLI Corrosion Inhibitor – Concentrate is a super concentrate and should be diluted to 5.5%-10% with good quality water before use. Compatible with glycol-based engine coolants but further dilution of the Delo XLI inhibitors by more than 25% with other corrosion inhibitor technologies will reduce the effectiveness of these products.
Heat Transfer
Silicate and phosphate free formulation does not contribute to deposit build up, as can be seen with phosphate and silicate containing coolants, which can help maintain heat transfer efficiency.
Low Maintenance
Requires very low maintenance compared with conventional products which require SCA.
Improved economics
No regular inhibitor additions and longer service life means lower overall maintenance costs.
Excellent toxicological and environmental aspects
Based on low toxicity inhibitors these products are readily biodegradable. The extended service life characteristic of this product contributes to the protection of the environment due to less frequent fluid disposal.
Easy Testing
Inhibitor concentration testing can be easily done using a brix refractometer.

Product features

Delo XLI Corrosion Inhibitor provides long life corrosion protection by using optimized and patented aliphatic carboxylate organic inhibitors that provide long lasting protection for cooling system metals and components including hard to protect aluminum.
Delo XLI Corrosion Inhibitor helps maintain excellent heat transfer since it does not contain silicates and phosphates which can over time create deposits on heat transfer surfaces.
Delo XLI Corrosion Inhibitor exhibits low depletion rates and does not require the addition of supplemental coolant additives with correct maintenance practices.
Dilution of Delo XLI Corrosion Inhibitor by more than 25% will reduce inhibitor performance.
Delo XLI Corrosion Inhibitor protects against erosion, corrosion and cavitation of cooling system components.

Applications

Delo XLI Corrosion Inhibitor is approved for use by the following OEMs:

GEC Alsthom Ruston
Liebherr MD 1-36-130 (DCA)
MaK
MB 312.0
MTU MTL 5049
MWM
Newman-Haas Racing
Wärtsilä 32-9011
Yanmar

Delo XLI Corrosion Inhibitor is approved for use by the following OEMs:

Caterpillar
Detroit Diesel
Deutz (TR0199-99-2091)
Komatsu
Liebherr MD 1-36-130 (DCA)
MAN 248
MAN Diesel (2-stroke and 4-stroke engines)
Scania TI 2-98 0813 TB
Sulzer Diesel ZBS0503
Ulstein Bergen
Volvo
Wärtsilä 32-9011

Delo® XLI Corrosion Inhibitor is also recommended for use in any OEM equipment recommending a nitrite free, water-based carboxylate based corrosion inhibitor, or where heavy duty mixed OEM fleets require a single coolant/inhibitor for ease of handling on site.

Toxicological & Environment Aspects

The results are listed below:

LD50 >2000 mg/kg (oral toxicity according to OECD guideline No 401)
LC50 >1000 mg/l (fish toxicity according to OECD guideline No 203)
Biodegradability: 92% (18 days) (test according to OECD guideline No 301E)

Product Reference

Product Number: 510636
Delo XLI Corrosion Inhibitor – Concentrate

Product Number: 510547
Delo XLI Corrosion Inhibitor – Premixed

Typical Test Data

DELO XLI CORROSION	TEST METHOD	RESULTS
Delo XLI Corrosion Inhibitor – Concentrate
Inhibitor content		50% w/w
Water content	ASTM D1123	50% w/w
Nitrite, amine, phosphate, borate, silicate		Nil
Color		Green fluorescent
Specific gravity, 20°C	ASTM D1122	1.06 typical
pH	ASTM D1287	9.4 typical
Storage stability		12 months if stored in non-opaque containers, 36 months if stored in opaque containers.
Delo XLI Corrosion Inhibitor – 7.5% dilution
Specific gravity, 20°C	ASTM D1122	1.01 typical
pH	ASTM D1287	8.1 typical
Effect on non-metals	GME 60 255	no effect
Hard water stability	VW PV 1426	no precipitate
Delo XLI Corrosion Inhibitor – 5% dilution
Specific gravity, 20°C	ASTM D1122	1.00 typical
pH	ASTM D1287	8.1 typical
Effect on non-metals	GME 60 255	no effect
Hard water stability	VW PV 1426	no precipitate

Table 1: Modified ASTM D1384 Glassware Corrosion Tests – 300 ppm chloride

	ASTM D1384 (MAX)	DELO XLI CORROSION INHIBITOR – 5% DILUTION
		– Weight loss in mg/coupon 1
Copper	10 max	0.6
Solder	30 max	4.5
Brass	10 max	0.6
Steel	10 max	0.0
Cast Iron	10 max	0.7
Aluminum	30 max	9.8
AlMn	/	4.8

Table 2: Modified MTU High Temperature Corrosion Test (2000 W)

	– Weight loss in mg/coupon 1
Test duration 116 hrs	Delo XLI Corrosion Inhibitor – 5% dilution in D9 water hot coupon	Delo XLI Corrosion Inhibitor – 5% dilution in FVV water hot coupon
Cast Iron	-1.3	-9.0
Aluminum SAE 329	9.3	-16.4
Aluminum AlMg Si1	1.8	40.7