Table 3 ED-XRF analysis of the concretions (wt%)

From: Corrosion mechanisms of a bluish-white porcelain of Hutian kiln excavated from Nanhai No. 1 shipwreck

Region

wt%

Al

Si

S

K

Ca

Ti

Fe

Natural surface

Yellow skeleton

9.9

41.5

3.3

1.4

0.6

0.5

42.8

Brown concretions

7.8

38.3

4.1

1.6

0.4

0.6

47.3

Black–brown filler

4.7

16.2

3.5

1.2

0.3

0.6

73.5

Bonding interface

Yellow–brown region

8.8

47.4

2.1

1.3

0.4

0.4

39.7

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